Hemizonia congesta
Hemizonia congesta subsp. calyculata
Cleveland's tarweed, hayfield tarweed
hayfield tarweed, Mendocino tarplant
blades 50–175+ × 2–8(–12+) mm.
hispidulous or strigose and often hirsute, all or distal densely stipitate-glandular.
0 or 1–3 mm, bracts (and calyculi) surpassing phyllaries.
hemispheric to ± urceolate or globose, 3.5–12 × 3–8+ mm.
5–8;
laminae white, abaxially purple-veined.
5–12 mm.
2.5–3.5 mm.
6–12 mm, apices usually longer than bodies.
usually of 5–7, sometimes 0, bractlets.
in spiciform-racemiform to spiciform-paniculiform arrays.
black, 2–3.5 mm.
widths 0.5–0.6 times lengths.
= 28.
Hemizonia congesta
Hemizonia congesta subsp. calyculata
Subspecies 6 (6 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Of conservation concern.
Subspecies calyculata occurs in the North Inner Coast Ranges and northern Sacramento Valley.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Heads in spiciform-racemiform to spiciform-paniculiform arrays (heads ± sessile); ray laminae white, abaxially purple-veined | → 2 |
1. Heads in racemiform or paniculiform arrays or in glomerules; ray laminae white or yellow, abaxially purple-veined or not | → 3 |
2. Peduncular bracts not or barely surpassing phyllaries; calyculi 0; phyllaries 3–7 mm, apices usually shorter than bodies; cypsela widths 0.6–0.75 times lengths | subsp. clevelandii |
2. Peduncular bracts (and calyculi) often notably surpassing phyllaries; calyculi usually of 5–7, sometimes 0, bractlets; phyllaries 6–12 mm, apices usually longer than bodies; cypsela widths 0.5–0.6 times lengths | subsp. calyculata |
3. Leaves usually puberulent and eglandular throughout, rarely the distal villous and glandular; heads in paniculiform arrays; ray laminae white, not purple-veined | subsp. tracyi |
3. Leaves pubescent, sericeous, or villous, all or the distal glandular; heads in paniculiform arrays or in glomerules; ray laminae white or yellow, abaxially purple-veined | → 4 |
4. Leaves ± villous (the distal with hairs at margins often longer); some or all heads usually in glomerules, sometimes in corymbiform or paniculiform arrays; phyllaries 6–10 mm, apices usually longer than bodies; ray laminae white | subsp. congesta |
4. Leaves pubescent, villous, or sericeous (the distal with hairs at margins not notably longer); heads in paniculiform arrays; phyllaries 3–7(–8) mm, apices usually shorter than bodies; ray laminae white or yellow | → 5 |
5. Ray laminae white | subsp. luzulifolia |
5. Ray laminae yellow | subsp. lutescens |
CA
OR
Flora NW
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
