Thelesperma burridgeanum
Proc. Biol. Soc. Wash. 41: 146. 1928.
Basionym: Cosmidium burridgeanum Regel Index Seminum (St. Petersburg) 1857: 40. 1858
Revision as of 18:48, 24 September 2019 by FNA>Volume Importer
Annuals, 30–40(–70+) cm. Cauline leaves crowded to ± scattered over proximal 1/2–3/4 of plant heights, internodes mostly 5–40(–60+) mm; lobes mostly linear to filiform, sometimes oblanceolate, 5–25(–45) × 0.5–1(–2+) mm. Calyculi of 5–6(–9) linear to narrowly triangular bractlets 2–4 mm (margins hispido-ciliate). Ray florets 8; laminae wholly red-brown to purplish or mostly red-brown with distal margins yellow to orange, 7–9(–12+) mm. Disc corollas red-brown to purplish, throats shorter than lobes. Cypselae 3.5–4 mm; pappi 0.5–1+ mm. 2n = 18.
Phenology: Flowering Apr–Jun.
Habitat: Disturbed sites on sands
Elevation: 10–200 m
Discussion
Thelesperma burridgeanum may be a color-form of T. filifolium.
Selected References
None.
Lower Taxa
None.