Directory       News       Site Map       Home
         
    Jepson eFlora
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.

 

MYOSURUS MOUSETAIL

Alan T. Whittemore


Annual, short-lived, generally tufted. Leaf: basal, simple, linear. Inflorescence: scapose, 1-flowered. Flower: sepals (3)5(8), 1.5–4 mm, alike, free, green or scarious-margined, spurred; petals 0–5, free, linear to narrowly spoon-shaped, long-clawed, white; stamens 5–25; pistils 10–400, 1–2.5 mm, ovules 1, styles thread-like. Fruit: achene, angled, wall not veined, styles persistent, ± enlarged in fruit; receptacle elongate, generally growing and producing ovules after flower.
± 15 species: temperate worldwide. (Greek: mouse tail) [Whittemore 1997 FNANM 3:135–138]
Unabridged etymology: (Greek: mus, mouse, and oura, tail)

Key to Myosurus

1. Fruit body not compressed, length ± = width, keel in depression; e Desert Mountains ..... M. cupulatus

1' Fruit body ± compressed laterally, length > width, keel not in depression; California Floristic Province, Great Basin Floristic Province

2. Inflorescence in fruit < leaves, peduncle 0–0.2 cm ..... M. sessilis

2' Inflorescence in fruit > leaves, peduncle 0.9–13 cm

3. Fruit beak erect, parallel to fruit surface, 0.05–0.4 mm ..... M. minimus

3' Fruit beak ± spreading, diverging from fruit surface, 0.6–1.4 mm ..... M. apetalus

4. Fruit aggregate 4–9 mm; sepal 1-veined, widely scarious-margined ..... var. borealis

4' Fruit aggregate 11–26 mm; sepal 3-veined, narrowly scarious-margined ..... var. montanus

Contact/Feedback

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].
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.