Flora of North America species comparison

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Sidotheca trilobata

three lobed oxytheca, three-lobed starry puncturebract, threelobe starry puncturebract
Habit Plants 0.7–5 × 0.7–6(–11) dm.
Stems

erect or more commonly spreading to prostrate.
Leaf

blades spatulate to oblanceolate or linear, 1–5(–9) × 0.2–0.7(–2) cm.
Inflorescences

open, 0.5–4 dm;

bracts mostly 2–8 × 1–3 mm, awns 0.8–1 mm.
Peduncles

erect to spreading, 0.5–1.5 cm, glabrous except sparsely glandular proximally.
Involucres

concolored, broadly turbinate, 3–8 mm, sparsely glandular;

teeth 5(–6), connate 1/3–1/2 their length;

awns greenish to reddish, 0.3–2 mm.
Flowers

3–5(–10);

perianth white to pink or reddish, 2.5–4 mm;

tepals oblong, 3-lobed apically 1/3–1/2 their length, lobes sometimes laciniate;

filaments 1–4 mm;

anthers red to maroon, ellipsoid to oval, 0.5–0.7 mm.
Achenes

golden-brown, 1.2–2 mm.
2n

= 40.

Sidotheca trilobata
Phenology Flowering Apr–Sep.
Habitat Sandy flats, washes, slopes, chaparral communities, montane coniferous woodlands
Elevation 700-2100 m (2300-6900 ft)
Distribution
from FNA
CA; Mexico (Baja California)
[WildflowerSearch map]
[BONAP county map]
Discussion

Sidotheca trilobata occurs in the Transverse Ranges of southern California from Los Angeles and San Bernardino counties southward into northern Baja California, Mexico. It is the most commonly encountered species of the genus.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 5, p. 440.
Parent taxa Polygonaceae > subfam. Eriogonoideae > Sidotheca
Sibling taxa
S. caryophylloides, S. emarginata
Synonyms Oxytheca trilobata, Eriogonum trilobatum
Name authority (A. Gray) Reveal: Harvard Pap. Bot. 9: 211. (2004)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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