Common name:
Heermann's tarweed
Family:
Scientific name:
Holocarpha heermannii
Main flower color:
Range:
California, mainly the Sierra Nevada, and near the coast
Height:
Up to 4 feet
Habitat:
Grassland, roadsides, up to 4,000 feet
Leaves:
Narrowly lanceolate to linear, sometimes toothed. Up to 2 inches long; smaller up the stem
Season:
May to November
Holocarpha heermannii is a strongly glandular species; stem and phyllaries are covered by broad, stalked, yellowish glands. Stems are typically around 2 to 3 feet tall, branching a few times, above the middle, with flowerheads at the branch tips, solitary or in small groups. Lower stem leaves are usually toothed, or lobed; upper stem leaves are reduced in size, closely-spaced, usually topped by a gland.
Involucres are widely bell-shaped or almost spherical. Phyllaries, three to 13, are elliptic to obovate. There are the same number of ray florets as the phyllaries; they are yellow, around a quarter of an inch long, divided at the tip up to half their length. Disc florets number from nine to 22.
Involucres are widely bell-shaped or almost spherical. Phyllaries, three to 13, are elliptic to obovate. There are the same number of ray florets as the phyllaries; they are yellow, around a quarter of an inch long, divided at the tip up to half their length. Disc florets number from nine to 22.
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