Difference between revisions of "Pyrrocoma racemosa var. paniculata"
Phytologia 71: 610. 1991.
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| − | |basionyms={{Treatment/ID/ | + | |basionyms={{Treatment/ID/Basionym |
|name=Homopappus paniculatus | |name=Homopappus paniculatus | ||
|authority=Nuttall | |authority=Nuttall | ||
| + | |publication_title=Trans. Amer. Philos. Soc., n. s. | ||
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|tribe=Asteraceae tribe Astereae | |tribe=Asteraceae tribe Astereae | ||
|genus=Pyrrocoma | |genus=Pyrrocoma | ||
Revision as of 18:45, 24 September 2019
Plants 20–75 cm. Stems glabrous. Leaves: basal blades oblanceolate to elliptic, 50–250 × 5–25 mm, rather thick and succulent, margins entire or denticulate, faces glabrous, often glaucous. Heads pedunculate or sessile, often crowded distally, in narrowly paniculiform, racemiform, or spiciform arrays. Involucres hemispheric, 6–8 × 8–12 mm. Phyllaries: bases pale, margins sometimes ciliate, apices erect, green, acute, faces glabrous. Cypsela faces glabrous or densely sericeous. 2n = 12, 24.
Phenology: Flowering Jul–Oct.
Habitat: Alkaline meadows, open fields, around hot springs and boggy areas
Elevation: 100–2500 m
Distribution
Calif., Idaho, Nev., Oreg., Utah.
Discussion
Variety paniculata is recognized by its relatively small involucres and glabrous phyllaries. This is the most variable variety and here includes a number of forms previously treated as separate varieties or subspecies. Both diploid and tetraploid races occur; there appears to be no corresponding morphologic differences (R. A. Mayes 1976).
Selected References
None.