Saxifragopsis fragarioides
| Saxifragopsis fragarioides | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Systematics | ||||||||||||
|
||||||||||||
| Scientific name of the genus | ||||||||||||
| Saxifragopsis | ||||||||||||
| Small | ||||||||||||
| Scientific name of the species | ||||||||||||
| Saxifragopsis fragarioides | ||||||||||||
| ( Greene ) Small |
Saxifragopsis fragarioides is the only plant species of the genus Saxifragopsis in the family of the Saxifragaceae (Saxifragaceae). It is native to the western United States .
description
Vegetative characteristics
Saxifragopsis fragarioides grows as a perennial herbaceous plant and reaches heights of 6 to 25 cm. It forms loose stands through woody rhizomes , but has stolons. The upright, unicellular, glandular hairy stem has no leaves, but only one or two bracts reduced to scales. The leaves standing together in a basal rosette are divided into a petiole and a leaf blade. The little glandular hairy petioles are 1.5 to 4 long. The 1.5 to 4 cm long leaf blade is broadly ovate and pinnate. The leaf margin is not lobed, but has only seven to eleven teeth and is ciliated. The leaf surface is smooth or sparsely hairy glandular. There are small stipules present.
Generative characteristics
In a compact, 6 to 25 cm long, umbrella- shaped inflorescence, there are 27 to 90 flowers above glandular hairy, scale-shaped bracts on pedicels. The flowers are hermaphroditic and five-fold with double perianth . The 5 to 9 mm long, bell-shaped, greenish, more or less glandular hairy flower cup (hypanthium) is fused to half of the ovary; the free area is about 0.2 mm long. The five expanded to recurved, triangular to egg-shaped sepals are green and about 2 mm long. The five white petals are spread out, obovate to lanceolate, 1.5 to 3 mm long and lobed. There are two circles with five 1 mm long stamens ; they do not rise above the petals. The two semi-permanent fruit under leaves are only about one quarter to one ovary grown. The ovules are completely fused. The two 0.8 to 1 mm long stylus do not protrude beyond the petals and each end in a scar. The flowering period extends from June to August.
The broadly egg-shaped, two-beaked capsule fruit is brown, rarely 3 to, usually 4 to 5 mm long and contains 50 to 75 seeds. The capsule fruit opens between the two short fruit beaks. The dark brown seeds are ovate-prismatic and smooth or ribbed.
The basic chromosome number is n = 7.
Occurrence
The home of Saxifragopsis fragarioides is in California , Oregon and Washington . Saxifragopsis fragarioides thrives primarily in crevices and mountain slopes (rubble fans) at altitudes between 1500 and 3000 meters. The occurrence of Saxifragopsis fragarioides is almost limited to the Siskiyou Mountains of California and Oregon. Isolated outside of this area are small populations in Washington that thrive about 500 meters lower than in the skin region.
Systematics
This species was first described in 1881 under the name Saxifraga fragarioides by Edward Lee Greene in Bulletin of the Torrey Botanical Club , Volume 8, No. 11, p. 121. John K. Small presented in 1896 with this species under the name Saxifragopsis fragarioides in Two New Genera of Saxifragaceae in Bulletin of the Torrey Botanical Club , 23, pp. 19-20, plate 257 the new genus Saxifragopsis .
The generic name Saxifragopsis is derived from the generic name Saxifraga and the Greek opsis for similar. The specific epithet fragarioides means strawberry-like.
swell
- Elizabeth Fortson Wells & Patrick E. Elvander: Saxifragopsis in the Flora of North America , Volume 8, 2009, p. 105: Genus and Species - Online.
Individual evidence
- ^ Edward Lee Greene: Bulletin of the Torrey Botanical Club , Volume 8, No. 11, 1981, p. 121 scanned in at biodiversitylibrary.org.
- ↑ John K. Small: Two New Genera of Saxifragaceae in Bulletin of the Torrey Botanical Club , 23, 1896, p. 19, plate 257 scanned at biodiversitylibrary.org.