|University of California, Berkeley|
|Directory News Site Map Home|
Key to families | Table of families and genera
This text currently parallels The Jepson Manual: Vascular Plants of California, Second Edition that is now available at the University of California Press.
Text appearing in blue on this page will not appear in the printed book; it will be displayed only on the Web. Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.
Annual, perennial herb, not green (holoparasites), generally glandular-puberulent distally; root attachment occasionally tuber-like.
Stem: simple or branched.
Inflorescence: generally ± spike-like ( proximal flowers often short-pedicelled or on short branches), generally dense; flowers generally > 20; bracts generally lanceolate to deltate (wider on peduncle); bractlets 0 or 2.
Flower: calyx lobes 4–5; corolla glandular-puberulent, generally lacking ring of hairs at stamen bases, upper lip erect to reflexed, 2-lobed, lower lip 3-lobed, spreading, throat floor with yellow folds; anthers glabrous to hairy; stigma lobes generally 2.
Fruit: 2-valved; placentas generally 2, often lobed.
Seed: < 0.7 mm.
140 species: worldwide, especially Medit. (Greek: vetch strangler, from parasitic habit) [Heckard 1973 Madroño 22:41–70]
1. Calyx 4-lobed, cut deeper on upper side; inflorescence open, flowers sessile, becoming well separated — pest on vegetable crops ..... O. ramosa
1' Calyx 5-lobed, cut equally or deeper on lower side; inflorescence dense, generally remaining so; at least proximal flowers ± pedicelled
2. Pedicels 3–15 cm, bractlets on pedicel 0; flowers 1–20; nectary gland at base of ovary evident
3. Fls generally 5–20; bracts > 6; distal pedicels < stem; corolla generally ± pink or yellow, lobes glabrous to soft-hairy; generally on Artemisia, Eriodictyon, Eriogonum, Galium ..... O. fasciculata
3' Fls generally 1–3; bracts generally < 6; distal pedicels > stem; corolla generally pale ± purple to ± yellow, lobes minutely ciliate; generally on Sedum, Saxifragaceae, Asteraceae ..... O. uniflora
2' Pedicels < 2(5) cm, bractlets on pedicel 2; flowers generally > 20; nectary gland at base of ovary obscure
4. Infl and flowers ± yellow to dark purple (may be ± red in Orobanche pinorum); calyx generally 5–12 mm
5. Calyx divided nearly to base on lower side; hairs of inflorescence and corolla papillate, not glandular; on Adenostoma ..... O. bulbosa
5' Calyx divided ± equally; most hairs of inflorescence and corolla glandular, not papillate; on various genera
6. Corolla with ring of hairs at base of filaments; root attachment rounded, coral-like; on Holodiscus ..... O. pinorum
6' Corolla lacking ring of hairs; root attachment branched (rarely rounded, coral-like in Orobanche cooperi)
7. Infl 4–5 cm wide; corolla 18–32 mm, lips 5–10 mm; on Asteraceae ..... O. cooperi
7' Infl 2–3 cm wide; corolla 12–18 mm, lips 3–5 mm; on Garrya ..... O. valida
8. Corolla 14–18 mm, hairy outside, densely so at sinuses, hairs 0.4–0.7 mm; filament base and anther hairy ..... subsp. howellii
8' Corolla 12–14 mm, puberulent outside, sparsely so to glabrous at sinuses, hairs ± 0.1 mm; filament base and anther glabrous ..... subsp. valida
4' Infl and flowers generally buff to ± pink, corolla lips white to pink or lavender, occasionally with darker veins (some populations of Orobanche californica, Orobanche parishii subsp. parishii darker-flowered); calyx generally 10–20 mm
9. Corolla 13–30 mm, lips 4–10 mm
10. Infl branched, forming convex or ± flat-topped cluster; flowers crowded; corolla tube with prominent hump on upper side, lobes erect; anthers densely hairy throughout; generally on Artemisia tridentata; n CaR, SNH, GB, n DMtns ..... O. corymbosa
10' Infl of elongate, generally unbranched, ± raceme-like units; flowers less crowded and more regularly-spaced; corolla tube without prominent hump on upper side, lobes various; anthers glabrous or hairy along dehisced margin; on Artemisia, other Asteraceae
11. Fls pedicelled throughout; bracts lanceolate; mature flower corolla lobes strongly recurved, narrowly acute ..... O. vallicola
11' Only proximal flowers pedicelled; bracts ± ovate; mature flower upper corolla lobes slightly recurved at tip, rounded or obtuse ..... O. parishii
12. Corolla 15–24 mm, lips 4–6 mm; calyx lobes generally 7–10 mm; sandy soil near ocean ..... subsp. brachyloba
12' Corolla 20–25 mm, lips 6–8 mm; calyx lobes 10–16 mm; dry openings in forest, chaparral, scrub ..... subsp. parishii
9' Corolla 20–50 mm, lips 10–14 mm, (see also Orobanche corymbosa for plants of SNH, GB) ..... O. californica
13. Corolla lavender to purple; calyx lobes, pedicels, and bracts similarly colored, drying dark purple; NCo, n&c CCo ..... subsp. californica
13' Corolla white to ± yellow to ± pink or ± red-tinged; calyx lobes, pedicels, and bracts pale to pink-tinged, drying brown; generally CA-FP (inland except Orobanche californica subsp. grandis), MP, s SNE
14. Corolla tube ± stout, > 4 mm wide at constriction, abruptly expanded to form hump-back throat
15. St delicate; ± 500 m; SCoRI ..... subsp. condensa
15' St stout; 700–2500 m; s SNH, Teh, TR, PR, s SNE, DMoj ..... subsp. feudgei
14' Corolla tube slender below, < 4 mm wide at constriction, gradually expanded
16. Corolla 35–50 mm, lower lobes narrowly ovate, > 5 mm wide; generally on Corethrogyne filaginifolia; coastal dunes, marine terraces; s CCo, s SCoRO (Santa Barbara Co.), c SCo (Los Angeles Co.), n ChI (Santa Rosa Island) ..... subsp. grandis
16' Corolla 20–40 mm, lower lobes narrowly triangular to oblong, < 5 mm wide
17. Plant 4–10 cm; stem proximal to inflorescence 1–5 cm; inflorescence a convex to ± flat-topped cluster < 5 cm; on Asteraceae; moist or vernally wet meadows, stream margins ..... subsp. grayana
17' Plant 10–35 cm; stem proximal to inflorescence generally > 6 cm; inflorescence elongate, 5–20 cm; generally dry places; on various per and shrub Asteraceae ..... subsp. jepsonii
Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.