Flora of North America species comparison

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Sidotheca emarginata

white-margin starry puncturebract, white-margined oxytheca
Habit Plants 0.3–3 × 0.3–5 dm.
Stems

spreading to prostrate.
Leaf

blades spatulate to oblanceolate, 1.5–7.5 × 0.4–1.5 cm.
Inflorescences

open, 0.2–3 dm;

bracts mostly 5–10 × 1–3(–5) mm, awns 1–2 mm.
Peduncles

erect, 0.5–3 cm, glandular.
Involucres

white-margined, broadly funnelform and laterally compressed, 4–8 × 9–12 mm, glabrous;

teeth 5, connate more than 3/4 their length, awns reddish, 1–1.5 mm.
Flowers

3–6;

perianth white to pink, (2–)3–4.5(–5) mm;

tepals narrowly oblong, 3–5-lobed apically 1/3–1/2 their length, lobes laciniate;

filaments 3–5 mm;

anthers red, oval to oblong, 1–1.2 mm.
Achenes

golden brown, 1.8–2 mm.

Sidotheca emarginata
Phenology Flowering Feb–Aug.
Habitat Gravelly to rocky places, chaparral communities, montane coniferous woodlands
Elevation 1200-2500 m (3900-8200 ft)
Distribution
from FNA
CA
[BONAP county map]
Discussion

Sidotheca emarginata grows in the San Jacinto and Santa Rosa mountains of Riverside County. The white-margined, papery involucre is a distinctive feature that might make the plant an attractive addition to an annual garden.

of conservation concern

(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. trilobata
Synonyms Oxytheca emarginata, Eriogonum emarginatum
Name authority (H. M. Hall) 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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