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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.

 

ADENOSTOMA

William Jones


Shrub, small tree, ± resinous. Stem: bark shredding. Leaf: simple, alternate, clustered or not, evergreen, short-petioled, stipuled or not, linear to oblanceolate or sickle-shaped, stiff or flexible. Inflorescence: panicle, terminal, 0.5–17 cm, many-flowered; pedicel bractlets generally present, lanceolate to elliptic. Flower: hypanthium 0.6–3.2 mm, throat obconic, glandular, persistent, ± enclosing fruit, bractlets 0; petals 1.5–2.5 mm; calyx lobes 1–1.5 mm; corolla lobes ± round, cream to white; stamens 10–15, in 5 groups of 2 or 3, alternate petals; ovary superior, chamber 1, ovules 1–2. Fruit: achene-like.
2n=18.
2 species: California, Baja California. (Greek: glandular mouth, from hypanthium ring gland)

Key to Adenostoma

1. Leaves not clustered, flexible, glandular, stipules 0; pedicel bractlets 5, unlobed, translucent; stamens 10–12 ..... A. sparsifolium

1' Leaves clustered, stiff, glabrous to puberulent, stipules < 1.5 mm; pedicel bractlets 1–3, 3-lobed, not translucent; stamens 15 ..... A. fasciculatum

2. Plants low, mounded; branches decumbent; Central Coast, Channel Islands ..... var. prostratum

2' Plants tall, not mounded; branches erect to ascending; North Coast Ranges, Cascade Range Foothills, Sierra Nevada, Central Western California, Southwestern California

3. Twigs glabrous (hairy); leaves generally linear to oblanceolate, 5–13 mm, tips generally acute-acuminate ..... var. fasciculatum

3' Twigs hairy; leaves oblanceolate to club-like, 2–6.5 mm, tips generally obtuse-mucronate ..... var. obtusifolium

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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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