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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.

 

SPIRAEA

Daniel Potter & Thomas J. Rosatti


Shrub, unarmed. Leaf: simple, oblong to (ob)ovate, generally serrate, deciduous; stipules generally 0; petiole 0–short. Inflorescence: raceme or panicle, many-flowered, bracted; pedicel bractlet generally 1, at top, generally linear. Flower: hypanthium obconic to bell-shaped, bractlets 0; sepals spreading to erect; petals spreading, pink to rose; stamens 15–many; pistils 5, opposite petals, free or fused at base, surrounded by hypanthium, ovaries superior, styles ± terminal, beak-like in fruit, stigmas head-like. Fruit: follicles 5, dehiscent along adaxial, top of abaxial suture. Seed: ± fusiform; coats membranous.
± 50 species: northern temperate. (Greek: shrub)

Key to Spiraea

1. Inflorescence longer than wide, not flat-topped; leaf tomentose abaxially, darker, ± glabrous adaxially; sepals generally soon reflexed ..... S. douglasii

1' Inflorescence generally wider than long, ± flat-topped; leaf glabrous to sparsely hairy, of ± same color adaxially, abaxially; sepals spreading to erect ..... S. splendens

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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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