Source: Wikipedia
| Dudleya abramsii | |
|---|---|
| |
| subsp. abramsii | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Saxifragales |
| Family: | Crassulaceae |
| Genus: | Dudleya |
| Species: | D. abramsii
|
| Binomial name | |
| Dudleya abramsii | |
Dudleya abramsii is a species complex of succulent plants native to California and parts of Baja California. There are numerous subspecies, some critically endangered, with varying habits and lifestyles, but most often characterized by a smaller size, yellow flowers, and an affinity for rocky habitats.[2] The subspecies may be polyphyletic.[3]
Description
[edit]Dudleya abramsii is a fleshy perennial forming a small basal cluster of leaves around a central caudex. The habit of Dudleya abramsii is growing in either solitary rosettes or in caespitose forms. The thick, glaucous leaves are lance-oblong to lanceolate, reaching up to 11 centimeters in length, but often remaining much smaller, usually 2 to 30 mm long, and 3 to 20 mm wide. The entire rosette is generally only 0.5 to 15 cm wide. The inflorescence is a mostly erect, branching stem lined with pointed bracts and bearing up to 15 flowers. The inflorescence has a peduncle 2 to 25 cm tall, and 1 to 6 mm wide. The lower bracts are 4 to 40 mm large, and the pedicels are anywhere from 0.5 to 7 mm long. The flower has five small, thick sepals at the base of five pale to cream yellow petals each roughly 8 to 13 mm long. The keel of the flower is tinged with fine, purple to red lines.[2]
Taxonomy
[edit]There are several subspecies, and many former subspecies with differing recognition. Flora of North America and The Jepson Manual have elevated Dudleya parva to a species, while other subspecies have been moved to Dudleya cymosa[2]
The following subspecies are recognized in the 2012 Jepson eFlora:
- Dudleya abramsii subsp. abramsii Rose (Abrams' liveforever) – native to the Peninsular Ranges of California and Baja California. Syn. Dudleya tenuis.
- Dudleya abramsii subsp. affinis K.M. Nakai (San Bernardino Mountains liveforever) – endemic to the San Bernardino Mountains near the edge of the Mojave Desert. Syn. Dudleya baldwinensis.
- Dudleya abramsii subsp. bettinae (Hoover) Bartel (San Luis Obispo serpentine dudleya or Betty's liveforever) – endemic to the coastal serpentine of San Luis Obispo County, California.
- Dudleya abramsii subsp. calcicola (Bartel & Shevock) K.M. Nakai (Limestone dudleya) – endemic to the southern Sierra Nevada. Syn. Dudleya calcicola
- Dudleya abramsii subsp. murina (Eastw.) Moran (San Luis Obispo or mouse-leaved dudleya) – endemic to coastal San Luis Obispo County
- Dudleya abramsii subsp. setchellii (Jeps.) Moran (Santa Clara Valley liveforever) – endemic to the Santa Clara Valley. Formerly classified under D. cymosa.
Distribution and habitat
[edit]D. abramsii is native to California and northern Baja California, where it grows in rocky areas in a number of habitat types.[2]
References
[edit]- ^ "NatureServe Explorer 2.0".
- ^ a b c d McCabe, Stephen Ward (2012). "Dudleya abramsii". Jepson eFlora. Jepson Flora Project (eds.). Archived from the original on 2017-08-29. Retrieved 18 October 2021.
- ^ Yost, J. M.; Bontrager, M.; McCabe, S. W.; Burton, D.; Simpson, M. G.; Kay, K. M.; Ritter, M. (2013). "Phylogenetic relationships and evolution in Dudleya (Crassulaceae)" (PDF). Systematic Botany. 38 (4): 1096–1104. doi:10.1600/036364413X674760. S2CID 15715233.
- Best, Troy L. (2007). "INDEX TO VOLUME 52". The Southwestern Naturalist. 52 (4): 630–645. doi:10.1894/0038-4909(2007)52[630:ITV]2.0.CO;2 (inactive 1 November 2024). ISSN 0038-4909.
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