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Key to families | Table of families and genera

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.

 

PYRACANTHA

Peter F. Zika


Shrub, ± evergreen; thorns often leafy or branched. Leaf: simple, ± evergreen, margin generally rolled under, unlobed, entire to toothed; stipules early-deciduous; petiole short. Inflorescence: raceme or panicle at ends of short-shoots; pedicel bractlets 0. Flower: hypanthium bractlets 0; sepals persistent; petals white; stamens 20, fused at base; ovary 1/2-inferior, chambers 5. Fruit: pome, drupe-like, ± spheric or depressed-spheric, open at top, stones 5, free, 2-ovuled.
10 species: Mediterranean, Asia. (Greek: fire thorn, from fruit color, thorns) Fruiting Jun–Apr.

Key to Pyracantha

1. Leaf generally serrate to crenate over much of margin

2. Leaf tip obtuse or ± notched, oblong-obovate to obovate; pedicels glabrous or sparsely hairy in flower; stones ± black ..... P. fortuneana

2' Leaf tip generally acute, generally oblong-elliptic to lanceolate, elliptic, or ovate (rarely oblanceolate in some Pyracantha coccinea); pedicels generally hairy in flower; stones brown

3. Hypanthium hairy in flower; new growth gray-hairy; leaves on vigorous shoots generally elliptic ..... [P. coccinea]

3' Hypanthium glabrous in flower; new growth rusty-hairy; leaves on vigorous shoots narrow-oblong-elliptic ..... [P. crenulata]

1' Leaf generally entire or with a few well separated low or rounded teeth toward tip

4. Sepals in fruit, young leaves densely gray-hairy abaxially; leaves generally narrowly oblong to ± oblanceolate ..... P. angustifolia

4' Sepals in fruit, young leaves ± glabrous or ± rusty- or yellow-brown-hairy abaxially; leaves narrowly oblanceolate to elliptic

5. Leaves generally widest near middle, tips generally obtuse or abruptly soft-pointed; petals generally ovate, 4–5 mm ..... [P. atalantioides]

5' Leaves generally widest above middle, tips generally truncate or ± notched; petals generally round or widely elliptic, 3–4 mm ..... P. koidzumii

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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].
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