Microseris D.Don

Silverpuffs (en)

Genus

Angiosperms > Asterales > Asteraceae

Characteristics

Perennial or annual scapose herbs with a short erect or rarely rhizomatous underground stem bearing 1–several fleshy brown to white roots. Hairs simple, multicellular, eglandular, furfuraceous on leaves, scapes and involucres, black-villous on petiole and scape bases and involucres. Leaves all or chiefly basal; petiole winged, widened at base. Scapes naked or bracteate; capitula solitary, nodding in bud; involucral bracts herbaceous, mostly in 2 unequal series; outer bracts much shorter than inner ones; receptacle epaleate, pitted. Florets: ligule yellow; anthers caudate; pollen mass orange. Style branches short, obtuse. Achenes narrowly terete, ribbed, not beaked. Pappus parts 2–66, persistent, each with a basal scale prolonged into a scabrid to plumose awn or rarely some or all parts capillary throughout.
More
Fls all ligulate and perfect, yellow; invol campanulate or narrower; achenes columnar to fusiform, but scarcely beaked, with a whitish basal callosity, ca 10-ribbed; pappus of 5–many members, these commonly with paleaceous base and slender, bristle-like tip, varying (in spp. approaching Agoseris) to merely obscurely flattened capillary bristles; lactiferous herbs with a taproot, entire to pinnatifid lvs, and 1–many heads on long naked peduncles. 25, chiefly w. U.S.
Capitula solitary on fistular scapes, many-fld, homogamous. Phyll. in 1 series, with a few bracteoles at base; receptacle nude, alveolate. Florets perfect, ligulate. Achenes us. glab., striate, not beaked; pappus-hairs dilated and paleaceous at base, barbellate above. Scapigerous herbs with milky juice. Genus of some 40 spp., mostly American, 1 sp. Australasian.
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Growth form herb
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Sexuality hermaphrodite
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Root system tap-root
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Hardiness (USDA) 4-11

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Cultivation

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