Sidotheca emarginata

(H. M. Hall) Reveal

Harvard Pap. Bot. 9: 211. 2004.

Common names: White-margin starry puncturebract
EndemicConservation concern
Basionym: Oxytheca emarginata H. M. Hall Univ. Calif. Publ. Bot. 1: 75, plate 14. 1902
Synonyms: Eriogonum emarginatum (H. M. Hall) S. Stokes
Treatment appears in FNA Volume 5. Treatment on page 440.

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.


Phenology: Flowering Feb–Aug.
Habitat: Gravelly to rocky places, chaparral communities, montane coniferous woodlands
Elevation: 1200-2500 m

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

Selected References

None.

Lower Taxa

None.
... more about "Sidotheca emarginata"
James L. Reveal +
(H. M. Hall) Reveal +
Oxytheca emarginata +
White-margin starry puncturebract +
1200-2500 m +
Gravelly to rocky places, chaparral communities, montane coniferous woodlands +
Flowering Feb–Aug. +
Harvard Pap. Bot. +
Endemic +  and Conservation concern +
Eriogonum emarginatum +
Sidotheca emarginata +
Sidotheca +
species +