Crepidiastrum denticulatum
Crepidiastrum denticulatum (Houtt.) Pak & Kawano
Crepidiastrum denticulatum is a biennial herb in the Asteraceae family, native to regions including China, Japan, Korea, and Vietnam. It features erect, often purplish stems, basal and cauline leaves, and dense clusters of yellow flower heads. The species was described in 1992 and is characterized by its distinct leaf morphology and flowering period from August to November.
Description
Crepidiastrum denticulatum is a slightly glaucescent biennial herb with fibrous roots. Stems are erect, 30-120 cm tall, branched, and often purplish red. Leaves include radical spatulate leaves that wither before flowering and numerous cauline leaves, with median leaves being membranaceous, spatulate, and mucronate-toothed. The plant produces yellow, ligulate flowers in dense corymbs, with each head containing 13-15 flowers. Achenes are lanceolate, brownish or black, and 12-ribbed, with a snow-white pappus. It flowers from August to November and has a chromosome number of 2n = 10. Originally described as Paraixeris denticulata in the Flora of Japan, it is now classified under the genus Crepidiastrum.
Distribution
Henan · Jiangxi · Honshu · Guizhou · Hunan · Hokkaido · Primorye · Shandong · Vietnam · Zhejiang · Hebei · Guangdong · Anhui · Sichuan · Amur · Liaoning · Jiangsu · Jilin · South Korea · Hubei · Khabarovsk · North Korea · Heilongjiang · Shanxi · Kyushu · Shikoku · China North-Central · China South-Central · China Southeast · Inner Mongolia
Synonyms
Crepidiastrum denticulatum f. pinnatipartitumParaixeris denticulata f. pallescensIxeris denticulata f. pinnatipartitaIxeris denticulataPrenanthes hastataLactuca denticulata f. pinnatipartitaYoungia denticulata f. pallescensDubyaea ramosissimaPrenanthes denticulataLactuca denticulata var. denticulataIxeris denticulata subsp. denticulataLactuca denticulata var. typicaParaixeris denticulata subsp. pubescensIxeris denticulata f. denticulataCrepidiastrum denticulatum f. denticulatumParaixeris denticulata var. denticulataParaixeris denticulata subsp. denticulataParaixeris denticulata f. denticulataLactuca denticulata f. denticulataCrepidiastrum denticulatum var. denticulatumParaixeris denticulataYoungia chrysanthaCrepidiastrum denticulatum var. cornutumParaixeris denticulata f. pinnatipartitaIxeris denticulataChondrilla denticulataParaixeris pinnatipartitaYoungia denticulataLactuca denticulataYoungia denticulata f. pinnatipartita
