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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.

 

MICROPUS

James D. Morefield


Annual 1–50 cm, green to ± gray, cobwebby to tomentose. Stem: 1(5), ± erect, central axis dominant, generally branched, ± evenly leafy. Leaf: alternate [opposite], ± sessile, narrowly oblanceolate to elliptic [spoon-shaped], entire; distal leaves subtending heads, scarcely crowded, largest > proximal leaves. Inflorescence: heads disciform, ± sessile, 1 or 2–5 perennial herb (dense) group; involucre ± cup-like; phyllaries 4–6, equal, obovate, rounded, << paleae, scarious, persistent; receptacle length 0.5–1.8 × width, depressed or obovoid, glabrous; paleae of pistillate flowers each enclosing flower, deciduous with fruit, ± compressed-obovoid, obtuse, distally bulged out and hood- or helmet-like, generally woolly abaxially, obscurely parallel-veined (veins 5+), margin ± reflexed distally as scarious wing (wing adaxially ± lateral, projected upward or inward, ± visible in head); paleae of disk flowers 0, or 1–3, reduced, erect, ± folded, lanceolate, acute, papery, scarious, glabrous. Pistillate flower: 4–12, all subtended by paleae; corolla obscure, narrowly cylindric. Disk flower: staminate, 2–5; pappus 0 or of 1–5 deciduous bristles (hidden in head); corolla 4–5 lobed; anther base tailed, tip ± triangular; style tips ± linear-oblong. Fruit: each enclosed by palea, ± obovoid, ± compressed laterally, smooth, shiny (corolla scar adaxial, lateral), pappus 0.
5 species: ± coastal southwestern North America, Mediterranean. (Greek: small foot) [Morefield 2006 FNANM 19:454–456] Our species (sect. Rhyncholepis) may comprise a separate North America. genus.

Key to Micropus

1. Mature paleae of pistillate flowers 8–12 in 2 series, ± helmet-like, body thick and cartilaginous near midvein, papery otherwise, wing projected inward from near top, prominent, ± flat to concave, ± obovate; receptacle length 1.2–1.8 × width; disk flower paleae 1–3, corolla lobes generally 4, pappus of 1–5 bristles, 1.7–2 mm ..... M. amphibolus

1' Mature paleae 4–7(8) in 1 series, ± hood-like, body thick and hard throughout, wing projected ± upward from adaxial edge, obscure, ± rolled, beak-like, ± linear; receptacle length 0.5–0.8 × width; disk flower paleae 0, corolla lobes generally 5, pappus 0 or of 1 bristle, 0.9–1.5 mm ..... M. californicus

2. Longest paleae generally 3–4 mm, woolly ..... var. californicus

2' Longest paleae generally 2–3 mm, silky-tomentose ..... var. subvestitus

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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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