Pericome caudata
Asteraceae tribe Heliantheae subtribe Peritylinae
mountain tail-leaf, mountain taper leaf, tail pericome, tail-leaf pericome, taper leaf, yerba del chivato
striate, terete, glabrous or hairy, often densely puberulent to tomentulose distally, sometimes gland-dotted.
petioles (5–)10–45 mm;
blades (2–)3.5–12(–15) × 1–12 cm.
cauline; opposite or alternate; petiolate or sessile;
blades mostly deltate to ovate or lanceolate overall, sometimes cordate, linear, reniform, rhombic, orbiculate, or ovate, often 3-lobed to pinnatisect, ultimate margins subentire to doubly serrate, faces glabrous or hairy, usually gland-dotted.
0.5–4 cm.
4.5–10 × 4–10 mm.
cylindric to campanulate or hemispheric.
flat or convex, epaleate.
0 or 8–12 pistillate, fertile;
corollas yellow or white.
tubes 1–3.5 mm, throats 2–5.5 mm, lobes 0.5–1 mm.
5–100+, bisexual, fertile;
corollas yellow or white, tubes shorter than or about equaling cylindric to funnelform or campanulate throats, lobes 4, deltate (equal);
anther thecae pale;
stigmatic papillae in 2 lines.
0.5–1 mm wide, apices attenuate.
persistent, 8–21 in 1(–3) series (distinct or connate, ovate to obovate or linear, subequal, often conduplicate, herbaceous, margins scarious).
0.
3–30+, usually tightly clustered.
radiate or discoid, borne singly or in corymbiform arrays.
3–5 mm;
pappi crowns to ca. 1 mm plus 0–2 bristles 1–4.5 mm.
linear or cuneiform to oblong or oblanceolate, strongly flattened or weakly 3–4-angled (callous-margined, usually ciliate);
pappi 0, or persistent or falling, vestigial, or of 8–12 linear to subulate, laciniate or fimbriate scales, sometimes 1–2(–4) scales aristate, or of 1–2(–6) or 8–35 bristles.
= 36.
Pericome caudata
Asteraceae tribe Heliantheae subtribe Peritylinae
Populations of Pericome caudata may vary in leaf shape, head size, and indument, particularly in some far western and eastern populations. Central populations (e.g., in Colorado, New Mexico, and Arizona) tend to have relatively large, deltate-hastate leaves with long-attenuate tips and capitulescences of medium-sized heads. Specimens from Nevada and California often have smaller, ovate or cordate distal leaves with short-attenuate tips, as well as larger and fewer heads per capitulescence. Oklahoma specimens are often coarsely pubescent with copious glands and have leaves similar to the Nevada and California populations. This variability does not appear to warrant taxonomic distinction, nor does the presence or absence of pappus bristles appear to be taxonomically significant.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Genera 5, species 67 (2 genera, 36 species in the flora).
Peritylinae appears to be relatively isolated among epaleate Heliantheae (H. Robinson 1981). B. G. Baldwin et al. (2002) included Lycapsus Philippi in Peritylinae.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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