Calystegia occidentalis
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Calystegia occidentalis |
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| Scientific name | ||||||||||||
| Calystegia occidentalis | ||||||||||||
| ( A.Gray ) Brummitt |
Calystegia occidentalis is a plant species from the genus of the bindweed ( Calystegia ) fromthe wind family (Convolvulaceae). The species is endemic to the United States .
description
Calystegia occidentalis is a finely downy-haired to finely tomentose, perennial plant that forms a woody caudex as a perennial organ. The stems are prostrate to strongly climbing. The leaf blade usually has a length of 1.5 to 4 cm and is more or less conspicuously lobed. The lobes are rounded to two-pointed, they form a round to more or less rectangular or pointed arch.
The inflorescences are one to four flowered and are smaller or slightly longer than the accompanying leaves. The prophylls are 5 to 12 mm long, linear to almost round, sessile or stalked, with entire margins or lobed like the leaves. They start 1 to 15 mm below the calyx , mostly they overlap it without enclosing it. The sepals are 9 to 15 mm long, the crown is white to creamy-yellow and 20 to 24 mm long.
distribution
The species is endemic to California and Oregon , where it grows on dry slopes, in chaparral and in pine forests. It can be found at altitudes between 300 and 2700 m.
Systematics
One can distinguish the following subspecies and varieties:
- Calystegia occidentalis subsp. fulcrata (A.Gray) Brummitt : It occurs in central and southern California.
- Calystegia occidentalis subsp. occidentalis : It occurs in Oregon and northern California.
- Calystegia occidentalis var. Tomentella (Greene) Brummitt : It occurs in northern California.
literature
- Richard K.Brummitt: Calystegia occidentalis . In: James C. Hickman (Ed.): The Jepson Manual - Higher Plants of California , University of California Press, 1993, ISBN 978-0-520-08255-7 .
Individual evidence
- ↑ a b c d Rafaël Govaerts (Ed.): Calystegia occidentalis. In: World Checklist of Selected Plant Families (WCSP) - The Board of Trustees of the Royal Botanic Gardens, Kew . Retrieved November 20, 2017.
