Hemizonia congesta subsp. congesta

EndemicConservation concern
Synonyms: Hemizonia congesta subsp. leucocephala Hemizonia leucocephala
Treatment appears in FNA Volume 21. Treatment on page 293. Mentioned on page 291, 292.

Leaves villous (the distal often with hairs longer at margins), all or distal glandular, often sparsely (rarely eglandular). Heads (some or all) usually in glomerules, sometimes in corymbiform or paniculiform arrays. Peduncles 0 or 1–4 mm, bracts not surpassing phyllaries. Calyculi 0. Phyllaries 6–10 mm, apices usually longer than bodies. Ray florets 5–13; laminae white, abaxially purple-veined. Cypsela widths 0.5–0.6 times lengths. 2n = 28.


Phenology: Flowering May–Nov.
Habitat: Grasslands, meadows, marsh edges
Elevation: 0–100 m

Discussion

Of conservation concern.

Subspecies congesta occurs in the San Francisco Bay area and North Coast Ranges. Natural hybrids between subsp. congesta and subsp. lutescens have been reported (E. B. Babcock and H. M. Hall 1924).

Selected References

None.

Lower Taxa

None.
Bruce G. Baldwin +  and John L. Strother +
de Candolle +
0–100 m +
Grasslands, meadows, marsh edges +
Flowering May–Nov. +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
Endemic +  and Conservation concern +
Hemizonia congesta subsp. leucocephala +  and Hemizonia leucocephala +
Hemizonia congesta subsp. congesta +
Hemizonia congesta +
subspecies +