Comprehensive Description
provided by North American Flora
Franseria linearis Rydberg
Gaertneria linearis Rydb. Bull. Torrey Club 32: 133. 1905.
A low perennial, shrubby at the base; stems about 3 dm. high, sparingly hirsute, angled
and striate; leaves subsessile, once or twice pinnatifid, 3-4 cm. long, strigose above, minutely
tomentulose beneath, ovate in outline; divisions linear, obtuse, 3-5 mm. long, somewhat
revolute-margined; heads racemose, the staminate ones nodding, on peduncles 1-2 mm. long;
involucre saucer-shaped, green, strigose, 3-4 mm. wide; lobes about 8, rounded-ovate; paleae
of che receptacle spatulate, 1-nerved; corolla glabrous; pistillate heads few. in the upper axils,
1-flowered; fruit strigose; beak subulate; spines 12-15, in about 3 series, nearly terete, hooked
at the apex.
Type locality: Calhan, Colorado.
Distribution: Known only from the type locality.
- bibliographic citation
- Per Axel, Rydberg. 1922. CARDUALES; AMBROSIACEAE, CARDUACEAE. North American flora. vol 33(1). New York Botanical Garden, New York, NY
