Sedum alamosanum
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| Sedum alamosanum | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Saxifragales |
| Family: | Crassulaceae |
| Genus: | Sedum |
| Species: | S. alamosanum |
| Binomial name | |
| Sedum alamosanum | |
Sedum alamosanum, known by the common name Alamos stonecrop, is a rare succulent plant native to the mountains of northwestern Mexico. It is characterized by white flowers and bluish-green leaves. It is found in Baja California Sur, Chihuahua, Durango, Sinaloa and Sonora.
Morphology
The rosettes are 1 to 1.5 cm high, 7 to 10 mm thick, with around 50 to 100 papillose and bluish leaves.[1]
The floral stems are 3 to 7 cm tall, and around 1 to 1.5 mm thick, textured smoothly, light green. The stems cluster around the base in flower. The bracts are spreading or somewhat ascending, oblong, narrowly rounded at the apex, sub-truncate at the base and contracted to a narrow point of attachment. The dimensions of the bracts are 4 to 6 mm long, 1 to 1.5 mm wide, and .75 to 1 mm thick. By the time of flowering, many of the bracts may have already withered or fallen off.[1]
The inflorescence has roughly 2 to 3 flowers, with pedicels 1 to 2 mm long, and around 1 mm thick, and papillose. The calyx is also papillose, with nearly-equal segments, that are ascending in bud and spreading in flower. The corolla is 8 to 9 mm wide, greenish-white and somewhat marked with pink. The petals are reflexed, triangular-lanceolate, acute, and 3.5 to 4 mm long, 1.25 to 1.5 mm wide. The filaments are whitish, ascending and the anthers are red, ovoid. Plants have a chromosome number of n=18.[1]
Flowering is from September to October.[2]
Taxonomy
The species was described by Sereno Watson. Reid Moran discovered the plants growing in the Sierra de la Giganta in Baja California Sur while on a botanical expedition with Anetta M. Carter.[1]