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Key to PrunusView taxon page for Prunus
(For a list of species in Prunus, use the above link.) Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots. 1. Inflorescence an elongate raceme In flowering plants excluding Asteraceae, Cyperaceae, Poaceae, and some other groups, an unbranched inflorescence in which the flowers are borne on pedicels and nearly always open from the bottom to the top of the inflorescence. 2. In Asteraceae, Cyperaceae, Poaceae, and some other groups, a raceme-like inflorescence is one in which the inflorescence units (e.g., heads in Asteraceae; spikelets in Cyperaceae and Poaceae), instead of individual flowers, are stalked and attached directly to the main axis of the inflorescence, not to branches, and in which floral development may or may not proceed as in 1. , flowers 15–many 2. Leaves deciduous, finely serrate Having margins with sharp, fine to coarse teeth generally pointing tipward, not outward; margins with such teeth on such primary teeth are doubly serrate. ; inflorescence leafy at base; fruit 6–14 mm ..... P. virginiana var. demissa 2' Leaves evergreen, entire Having margins that are continuous and smooth (i.e., without teeth, lobes, etc.). or spiny-serrate; inflorescence leafless at base; fruit 12–25 mm ..... P. ilicifolia 3. Leaf margin spiny-serrate, ± wavy, blade Expanded portion of a leaf, petal, or other structure, generally flat but sometimes rolled, cylindric, wavy, or cupped. widely ovate Egg-shaped (i.e., widest below the middle) in two dimensions (i.e., in one plane), as a leaf. to round; petiole Leaf stalk, connecting leaf blade to stem; sometimes more or less indistinct. 3–10 mm; s NCoR, CW, SW (except ChI) ..... subsp. ilicifolia 1' Inflorescence a short, ± flat-topped raceme of (3)6–12 flowers, or umbel-like to subsessile cluster of 2–5 flowers, or flowers 1 4. Ovary, fruit generally glabrous 5. Inflorescence a raceme; sepal entire; fruit 7–14 mm; twigs with true terminal bud 1. An incompletely developed, more or less embryonic shoot, usually covered with bud scales. 2. An unopened flower, often protected by sepals. ..... P. emarginata 5' Inflorescence an umbel-like cluster or flowers 1; sepal gland-toothed to nearly entire; fruit 15–30 mm; twigs with false terminal bud 6. Leaf blade elliptic In the shape of a flattened circle or ellipse; wider than linear to (ob)ovate, base obtuse Having a short-tapered, blunt tip or base, the sides convex or straight and converging at more than a right angle. ; flowers 1(2), appearing before leaves; tree, roadsides, streambanks, chaparral as waif ..... P. cerasifera 6' Leaf blade oblong-ovate to ± round, base rounded to subcordate; flowers 2–5, appearing with leaves; shrub, mixed-evergreen or conifer forest ..... P. subcordata 4' Ovary, fruit densely puberulent Minutely hairy. or velvety 7. Tree 3–10 m, not thorny; 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). blade 25–150 mm; fruit 25–80 mm; petals 10–25 mm 8. Petiole (8)10–25 mm; leaf blade 25–100 mm; petals pink to nearly white; fruit pulp leathery ..... P. dulcis 8' Petiole 5–10(15) mm; leaf blade (50)70–150 mm; petals dark pink; fruit pulp fleshy ..... P. persica 7' Shrub < 4 m, often thorny; leaf blade 5–30 mm; fruit 7–18 mm; petals 1.4–12 mm 9. Leaf blade < 2 × longer than wide, base wedge-shaped to rounded or subcordate 10. Leaf blade ovate to obovate, ± hairy, base wedge-shaped to obtuse; flowers generally unisexual; hypanthium Structure generally in the shape of a tube, cup, or bowl, derived from the fused lower portions of the perianth and stamens, from which these parts seem to arise, and to which the ovary wall is fused in an inferior ovary (to which the ovary wall is partially fused in a half-inferior ovary; from which the ovary is free in a superior ovary). , sepals densely puberulent abaxially ..... P. eremophila 10' Leaf blade ovate to round, glabrous, base obtuse to rounded or subcordate; flowers bisexual Both male and female reproductive parts occurring and functional in the same plant or structure (e.g., flower, spikelet, inflorescence). ; hypanthium, sepals glabrous abaxially ..... P. fremontii 9' Leaf blade >= 2 × longer than wide, base long-tapered 11. Petals (5)8–11 mm, dark pink to nearly white; pedicel Stalk of an individual flower in an inflorescence, or the corresponding structure in fruit. (1)4–12 mm; leaf blade 2–6 mm wide, finely serrate ..... P. andersonii 11' Petals 1.4–4 mm, white to ± yellow; pedicel 0–4 mm; leaf blade 1–2(4) mm wide, generally entire ..... P. fasciculata
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Citation for the whole project: Jepson Flora Project (eds.) . Jepson eFlora, https://ucjeps.berkeley.edu/eflora/ [accessed on ]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on .
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