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Key to FrangulaView taxon page for Frangula
(For a list of species in Frangula, use the above link.) Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots. 1. Leaves deciduous, blades thin 2. Fruit 3-stoned; 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 Expanded portion of a leaf, petal, or other structure, generally flat but sometimes rolled, cylindric, wavy, or cupped. (50)80–150 mm ..... F. purshiana 3. Leaf blade blue- or green-gray, ± glaucous when fresh, papillate Pertaining to a surface (e.g., of a leaf, stigma, fruit) bearing small, rounded or conic protuberances (papillae). , densely hairy or adaxially velvety, light green, abaxially sparsely to densely hairy ..... subsp. ultramafica (2) 3' Leaf blade green, not papillate, glabrous to sparsely hairy 4' Leaf base rounded or cordate Heart-shaped; often pertaining to a leaf in which the blade base on both sides of the petiole is rounded and convex. ; NCo, KR, NCoRO, NCoRH ..... subsp. purshiana 5' Leaf blade glabrous or abaxially puberulent Minutely hairy. on midrib, veins 6' Twigs red to gray; leaves scattered along stem 7' Leaf base, tip acute Having a short-tapered, sharp tip, the sides convex or straight and converging at less than a right angle. ..... subsp. rubra 1' Leaves semi-deciduous or evergreen, blades ± leathery or thin 8. Leaves semi-deciduous, fruit 2–3-stoned 9' Leaf blade ± leathery, 50–100 mm, widely oblong Longer than wide, with nearly parallel sides; wider than linear. or ovate Egg-shaped (i.e., widest below the middle) in two dimensions (i.e., in one plane), as a leaf. to obovate; fruit 3-stoned ..... F. purshiana subsp. ultramafica (2) 10. Leaf blade ± glabrous or abaxially ± puberulent 10' Leaf blade adaxially glabrous to tomentose Covered with densely interwoven, generally matted hairs. , abaxially glabrous to tomentose, velvety, or silvery 12. Leaf blade adaxially green, glabrous or minutely puberulent, abaxially glabrous to white-tomentose mixed with long hairs 13. Leaf tip abruptly pointed or not, margin dentate Having margins with sharp, relatively coarse teeth pointing outward, not tipward. to dentate-serrate, long hairs conspicuous abaxially; c&s SN, Teh, TR, nw PR, SnJt, SNE, DMoj ..... subsp. cuspidata (2) 13' Leaf tip acute to rounded, margin entire Having margins that are continuous and smooth (i.e., without teeth, lobes, etc.). to 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. , long hairs inconspicuous abaxially; DMtns (Clark, New York, Providence mtns) ..... subsp. ursina 12' Leaf blade white-tomentose, or adaxially dull green, glabrous, abaxially white-tomentose or velvety to silvery, long hairs 0. 14' Leaf blade widely elliptic, abaxially white-tomentose or velvety to silvery 15. Leaf blade adaxially white-tomentose, tip obtuse Having a short-tapered, blunt tip or base, the sides convex or straight and converging at more than a right angle. ; s KR, NCoRI ..... subsp. crassifolia 15' Leaf blade adaxially glabrous (white-tomentose), tip acute; s KR, NCoR, CaRF, SNF, n SNH, ScV, SnFrB, SCoR, SW ..... subsp. tomentella (2)
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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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