|Clematis lasiantha in Mt. Diablo State Park, Contra Costa County, California|
It is found on the Pacific coast of North America, from the San Francisco Bay Area southwards into Baja California. It extends as far east as the western foothills of the Sierra Nevada mountains, but does not grow in the Central Valley, nor at heights greater than about 2,000 metres (6,600 ft). It grows on hillsides, in chaparral, and in open woodland.
Clematis lasiantha, the Pipestem Clematis, flowers from January to June. Its leaves are 3-lobed, and generally grow groups of three to five leaflets, the largest leaves on the plant normally being between 3 and 5 cm in size. The Pipestem Clematis can be distinguished from the similar (but much more widely ranging) Virgin's Bower (Clematis ligusticifolia) by the fact that Pipestems normally only have one flower on each stalk, and at most three, whereas the Virgin's Bower has multiple flowers on each stem. The Pipestem also has more pistils in each flower, but since both species have many, this is not an easy criterion to apply. The Virgin's Bower is more likely to be found along streams or in other wet places, whereas the Pipestem tolerates more open, drier places.
- Keener, Carl S.; W. Michael Dennis (February 1982). "The Subgeneric Classification of Clematis (Ranunculaceae) in Temperate North America North of Mexico". Taxon 31 (1): 37–44. doi:10.2307/1220586. Retrieved 29 August 2012.
- Peinado, M.; Alcaraz, F.; Aguirre, J. L.; Delgadillo, J.; Aguado, I. (1995). "Shrubland formations and associations in mediterranean-desert transitional zones of northwestern Baja California". Vegetatio 117 (2): 165–179. doi:10.1007/BF00045507. ISSN 0042-3106.
- Peinado, M.; Macías, M. Á.; Ocaña-Peinado, F. M.; Aguirre, J. L.; Delgadillo, J. (2010). "Bioclimates and vegetation along the Pacific basin of Northwestern Mexico". Plant Ecology 212 (2): 263–281. doi:10.1007/s11258-010-9820-z. ISSN 1385-0237.
- Xie, Lei; Li, Liang-Qian (2012). "Variation of pollen morphology, and its implications in the phylogeny of Clematis (Ranunculaceae)". Plant Systematics and Evolution. doi:10.1007/s00606-012-0648-y. ISSN 0378-2697.
- Timbrook, Jan (1990). "Ethnobotany of chumash indians, California, Based on Collections by John P. Harrington". Economic Botany 44 (2): 236–253. doi:10.1007/BF02860489. ISSN 0013-0001.
- Sands, Anne (1980). Riparian forests in California: their ecology and conservation: a symposium. Berkeley: Division of Agricultural Sciences, University of California. ISBN 0-931876-41-9.
|Wikimedia Commons has media related to Clematis lasiantha.|
- Treatment from the Jepson Manual - Clematis lasiantha
- Clematis lasiantha - Photographs @ CalPhotos
- Entry in the online Flora of North America; Clematis lasiantha
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