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Key to BoecheraView taxon page for Boechera
(For a list of species in Boechera, use the above link.) Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots. 1. Fruit, generally ovary hairy 2. Fruit pedicel  Stalk of an individual flower in an inflorescence, or the corresponding structure in fruit. < 2.5 mm; petals ± yellow to brick-red ..... B. yorkii 2' Fruit pedicel > 2.5 mm; petals purple, lavender, or white 3. Fruit pedicel base generally abruptly recurved  Gradually curved downward or backward. ; fruit generally appressed  Parallel or nearly parallel to and often in contact with surface of origin; used to describe the disposition of hairs, leaves, pedicels, etc. to inflorescence axis 4. Stems elevated above ground surface on woody base; petals 9–16 mm; fruit 2.5–4 mm wide; seeds 1.7–2.8 mm ..... B. pulchra 4' Stems from ± ground surface, from non-woody caudex  Generally short, sometimes woody, more or less vertical stem of a perennial, at or beneath ground level. ; petals 4–8 mm; fruit 0.9–1.8 mm wide; seeds 1–1.4 mm ..... B. retrofracta (3) 3' Fruit pedicel base not abruptly recurved; fruit generally not appressed to inflorescence axis 5. Proximal stems with simple  Composed of a single part; undivided; unbranched. and 2-rayed hairs only 5' Proximal stems with at least some 3–12-rayed hairs 7. Petals generally < 9 mm 8. Stem proximally with 7–12-rayed hairs; seeds 1–1.3 mm, generally in 2 rows ..... B. shockleyi (2) 8' Stem proximally with generally 3–7-rayed hairs; seeds 1.4–6 mm, in 1 row 9. Basal leaves > 6 mm wide; fruit erect  Upright; vertically oriented. to ascending  Curving or angling upward from base, or about 30-60 degrees less than vertical or away from axis of attachment. ; seeds 2.5–6 mm, wing  1. Thin, flat extension or appendage of a surface or margin. 2. In many members of Fabaceae and in some other groups, each of two lateral petals. 0.7–1.8 mm wide ..... B. repanda (2) 9' Basal leaves < 6 mm wide; fruit horizontal to pendent (appressed); seeds 1.4–2.5 mm, wing 0.05–0.3 mm wide 10. Style < 0.2 mm; basal  At or near the base of a plant or plant part. Especially said of leaves clustered near the ground or of a placenta confined to the base of an ovary. leaves generally dentate  Having margins with sharp, relatively coarse teeth pointing outward, not tipward. ; fruit 1.9–2.2 mm wide; seeds 1.4–1.8 mm ..... B. puberula 10' Style 1.5–2 mm; basal leaves entire  Having margins that are continuous and smooth (i.e., without teeth, lobes, etc.). ; fruit 2.5–3 mm wide; seeds 2–2.5 mm ..... B. serpenticola (2) 7' Petals generally > 9 mm 11' Basal leaves generally entire; style generally < 0.5 mm; ovules > 60 12. Basal leaves 1–2 mm wide; inflorescence 7–15-flowered; fruit pedicel generally ascending near base, recurved near tip ..... B. lincolnensis 12' Basal leaves 3–13 mm wide; inflorescence > 15-flowered; fruit pedicel descending or horizontal near base 13' Fruit generally < 7 cm, hairy on distal 2/3, glabrous near base; seeds 2–2.5 mm, generally irregularly in 2 rows ..... B. xylopoda 14. Cauline leaf  Organ arising from a stem, generally composed of a stalk (petiole) and a flat, expanded, green, photosynthetic area (blade); distinguished from a leaflet by the presence in its axil of a bud, branch, thorn, or flower; sometimes with lateral, basal appendages (stipules); either simple (toothed, lobed, or dissected but not divided into leaflets) or compound (divided into leaflets). base not lobed 17. Basal leaves glabrous or hairs simple only 18' Leaves glabrous; petals 6–10 mm 19. Caudex with crowded, persistent leaf bases; fruit ascending, not appressed to inflorescence axis; seeds in 1 row ..... B. davidsonii 19' Caudex without crowded, persistent leaf bases; fruit erect, appressed to inflorescence axis; seeds generally in 2 rows ..... B. lyallii (3) 17' Basal leaves with at least some branched hairs 20. Plant generally glabrous throughout except margins of basal leaves 21. Fruit generally > 3 mm wide; seeds 3–6 mm 22. Margins of basal leaves with some 3–4-rayed hairs; ovules 18–30; pollen spheric ..... B. covillei (3) 22' Margins of basal leaves with simple and 2-rayed hairs; ovules 10–20; pollen ellipsoid ..... B. howellii (2) 21' Fruit generally < 3 mm wide; seeds 1.5–2.2 mm 20' Plant at least hairy on surfaces of basal leaves, generally throughout pl 24. Fruit pendent or descending 25' Fruit < 3 mm wide; seeds < 2 mm 26. Fruit pedicel base generally abruptly recurved; fruit reflexed  Abruptly bent or curved downward or backward. , generally appressed to inflorescence axis; cauline leaves 15–40; inflorescence generally > 15-flowered ..... B. retrofracta (3) 26' Fruit pedicel base not abruptly recurved; fruit wide-pendent, not appressed to inflorescence axis; cauline leaves 2–17; inflorescence < 15-flowered 24' Fruit erect, ascending, or horizontal 28' Inflorescence not 1-sided in fruit 29. Basal leaves generally wavy-margined to dentate, generally > 10 mm wide ..... B. repanda (2) 29' Basal leaves entire, generally < 10 mm wide 30. Proximal stems with simple and branched hairs 30' Proximal stems with branched hairs only 32. Surfaces of basal leaves with at least some 8–14-rayed hairs 32' Surfaces of basal leaves with 2–7-rayed hairs only 34. Fruit 3–5.5 mm wide; seeds 3–8 mm, wing 0.8–2.5 mm wide 35. Basal leaves with short-stalked hairs generally 0.1–0.25 mm; fruit edges wavy, constricted between seeds ..... B. platysperma 35' Basal leaves with long-stalked hairs generally 0.25–0.5 mm; fruit edge not wavy or constricted between seeds ..... B. ultraalsa 34' Fruit 2–3.2 mm wide; seeds 2.5–3.5 mm, wing 0.2–0.9 mm wide 36. Sepals glabrous; basal leaves 2–6 mm wide, with generally sessile  Without a petiole, peduncle, pedicel, or other kind of stalk. hairs; fruit erect-ascending, generally appressed to inflorescence axis ..... B. elkoensis (2) 36' Sepals sparsely hairy; basal leaves 1–3 mm wide, with stalked hairs; fruit ascending, not appressed to inflorescence axis ..... B. pinzliae (2) 14' Cauline leaf base lobed 37. Stems glabrous proximally 38. Fruit erect, generally appressed to inflorescence axis 39' Basal leaves with either sessile 2-rayed or short-stalked 2–6-rayed hairs, or occasionally glabrous 40. Petals white, occasionally pale lavender in age; cauline leaves 6–52; surfaces or margins of basal leaves with sessile 2 rayed hairs, occasionally glabrous ..... B. stricta (2) 40' Petals lavender to purple; cauline leaves 1–7; surfaces of basal leaves glabrous, margins with simple and short-stalked, branched hairs, occasionally glabrous 41' Ovules generally > 30; seed generally in 2 rows, < 3 mm, wing 0.3–0.5 mm wide ..... B. lyallii (3) 38' Fruit reflexed, pendent, horizontal, or ascending (± erect), generally not appressed to inflorescence axis except generally when reflexed 42. Fruit pendent to strongly reflexed 43. Stems arising at ground level, generally lacking woody bases; surfaces of basal leaves with some simple hairs; inflorescence generally > 12-flowered ..... B. rectissima (2) 43' Stems elevated above ground level on woody base; surfaces of basal leaves lacking simple hairs, generally glabrous; inflorescence generally < 12-flowered 44. Petals 8–11 mm, ± white; fruit 2.5–3.5 mm wide; inflorescence 3–7-flowered ..... B. rollei 44' Petals 4.5–6 mm, ± purple or rose at least near tip; fruit 3–6 mm wide; inflorescence 6–12-flowered ..... B. suffrutescens (3) 42' Fruit ascending to horizontal or ± descending (± erect) 45' Cauline leaves < 14; seeds in 1 row; fruit generally < 6 cm; montane habitats on mainland 46. Fruit > 2.9 mm wide; seeds 3–6 mm 47. Margins of basal leaves with some 3–4-rayed hairs; ovules 18–30; pollen spheric ..... B. covillei (3) 47' Margins of basal leaves with simple and 2-rayed hairs; ovules 10–20; pollen ellipsoid ..... B. howellii (2) 46' Fruit < 2.9 mm wide; seeds 1–2.2 mm 48' Inflorescence not 1-sided in fruit 49. Surfaces, margins of basal leaves with 4–7-rayed hairs; ovules 56–80; pollen spheric ..... B. peirsonii (2) 49' Surfaces of basal leaves glabrous, margins with simple and 2–3-rayed hairs; ovules 14–22; pollen ellipsoid ..... B. tiehmii (2) 37' Stems hairy proximally 50. Fruit descending, pendent, or strongly reflexed 51. Fruit pedicel base generally abruptly recurved 52' Fruit < 2.7 mm wide; ovules 46–126; inflorescence generally > 12-flowered 53' Stem proximally with simple and branched hairs, or simple hairs only 51' Fruit pedicel base ± recurved or straight 56. Stem proximally with simple and branched hairs, or simple hairs only 57. Petals generally > 8 mm, purple to magenta; stems elevated above ground level on woody caudex with crowded, persistent leaf bases; pollen ellipsoid ..... B. koehleri (3) 57' Petals generally < 8 mm, lavender to white; stems from ± ground level, generally lacking woody caudex and crowded, persistent leaf bases; pollen spheric 58' Fruit reflexed to ± appressed; fruit pedicel with few simple and 2-rayed hairs only, occasionally glabrous ..... B. pinetorum (3) 56' Stem proximally with branched hairs only 59' Petals generally < 9 mm; fruit generally < 6 cm 60. Surfaces of basal leaves with hairs 0.1–0.2 mm; seed wing 0.25–0.5 mm wide; ovules 34–64; pollen ellipsoid ..... B. cobrensis (2) 60' Surfaces of basal leaves with hairs 0.2–0.7 mm; seed wing < 0.25 mm wide; ovules 74–134; pollen spheric ..... B. inyoensis (2) 55' Fruit pedicel glabrous (sparsely hairy) 61. Petals generally > 8 mm, purple to magenta; caudex woody, leaf bases crowded, persistent ..... B. koehleri (3) 61' Petals generally < 8 mm, white to lavender (rose-purple); caudex woody or not, crowded-persistent leaf bases 0 62. Fruit > 2.7 mm wide; seed wing > 0.7 mm wide; stems elevated above ground surface on woody caudex ..... B. suffrutescens (3) 62' Fruit < 2.7 mm wide; seed wing < 0.7 mm wide; stems generally not elevated above ground surface on woody caudex 63. Fruit reflexed to ± appressed; pollen spheric; KR, CaR, SN 63' Fruit wide-pendent to spreading-descending, not appressed; pollen ellipsoid; SW, GB, D 65' Stem proximally generally branched-hairy; seeds in 1 row 50' Fruit erect, ascending, or horizontal (pendent) 67. Leaf hairs ± sessile, branches generally appressed; sepals generally glabrous 68. Basal leaves with branched hairs 2-rayed only; petals white, occasionally pale lavender in age; pollen ellipsoid ..... B. stricta (2) 68' Basal leaves with some 3–4-rayed hairs; petals purple to lavender (± white); pollen spheric 69. Fruit erect to ascending, generally appressed to inflorescence axis 69' Fruit spreading-ascending to horizontal, not appressed to axis 67' Leaf hairs stalked, branches not appressed; sepals generally hairy 72. Stem proximally with some simple hairs 73' Fruit ascending to horizontal, not appressed to inflorescence axis; ovules > 40 74. Fruit pedicel hairs 2–4-rayed only 75' Fruit 1.5–2.2 mm wide, ovules 80–250; leaf surface hairs >= 0.3 mm 76. Petals 9–14 mm, purple; fruit pedicel generally > 10 mm; pollen ellipsoid ..... B. arcuata (2) 76' Petals 5–8 mm, lavender to ± white; fruit pedicel generally < 10 mm; pollen spheric ..... B. pauciflora (2) 74' Fruit pedicel glabrous or with simple, occasionally some 2-rayed hairs 77. Basal leaves generally <= 3 mm wide; caudex woody, with crowded, persistent leaf bases ..... B. koehleri (3) 77' Basal leaves generally > 3 mm wide; caudex woody or not, crowded-persistent leaf bases 0 78. Distal cauline leaves glabrous, occasionally ciliate  Having generally straight, conspicuous hairs along margins or edges. ; cauline leaf basal lobes  1. A major expansion or bulge, such as on the margin of a leaf, sepal, or petal, or on the surface of an ovary. 2. The free tips of otherwise fused structures, such as sepals or petals; larger than teeth. generally > 3 mm; NW, CaR, SNE ..... B. sparsiflora 78' Distal cauline leaves hairy; cauline leaf basal lobes generally < 3 mm; widespread 72' Stem proximally with branched hairs only 81' Inflorescence not 1-sided in fruit 82. Stem proximally with at least some 2–3-rayed hairs 83' Petals 4–7 mm; inflorescence 5–25-flowered; pollen spheric; mainland montane areas 84' Petals purple; fruit > 1.9 mm wide; SnBr, W&I 85. Inflorescence 12–25-flowered; stem proximally with hairs 0.4–0.6 mm only; seeds 1–1.5 mm; SnBr ..... B. peirsonii (2) 85' Inflorescence 5–8-flowered; stem proximally with hairs 0.05–0.2 mm only; seeds 2.5–3.5 mm; W&I ..... B. pinzliae (2) 82' Stem proximally with 4–12-rayed hairs only 88' Style < 0.7 mm; ovules 74–190 89. Petals 1.2–2 mm wide; surfaces of basal leaves with hairs 0.2–0.7 mm; seeds 1.7–2 mm; pollen spheric ..... B. inyoensis (2) 89' Petals 0.8–1.2 mm wide; surfaces of basal leaves with hairs 0.1–0.2 mm; seeds 1–1.3 mm; pollen ellipsoid ..... B. shockleyi (2)
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