Comprehensive Description
(
İngilizce
)
North American Flora tarafından sağlandı
Picradeniopsis oppositifolla (Nutt.) Rydb.; Britton, Man. 1008
1901.
Tricho phyllum oppositifolium Nutt. Gen. 2: 167. 1818. Helenium oppositifolium Spreng. Syst. 3: 573. 1826. Bahia oppositifoUa DC. Prodr. 5: 656. 1836. Eriophyllmn oppositifoUiim Heynh. Nom. Bot. 310. 1840.
A low suffruticose perennial; stem 1-3 dm. high, much-branched, angled, canescentpuberulent; leaves opposite, 3-5-divided into linear or oblong divisions or entire, 1-3 cm. long, canescent-strigose and conspicuously punctate, thick; peduncles short; involucre campanulate, 5 mm. high, 7-8 mm. wide; bracts oblong, about 10, the outer ones carinate, 3-ribbed; ligules 5-6, oval, 3-4 mm. long; disk-flowers numerous; corollas 3 mm. long; achenes narrowly obpyramidal, 4-angled, glandular-puberulent; squamellae 1 mm. long, ovate or obovate, with a distinct midrib.
Type locality: Hills near Fort Mandan [North Dakota]. Distribution: North Dakota to Montana, Arizona, and Texas.
- bibliyografik atıf
- Per Axel Rydberg. 1914. (CARDUALES); CARDUACEAE; HELENIEAE. North American flora. vol 34(1). New York Botanical Garden, New York, NY
