Mat-forming rock spar
| Mat-forming rock spar | ||||||||||||
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Mat-forming rock spar ( Petrophytum caespitosum ) |
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| Petrophytum caespitosum | ||||||||||||
| ( Nutt. Ex Torr. & A.Gray ) Rydb. |
The mat-forming rock spar ( Petrophytum caespitosum ) is a species of plant from the genus Petrophytum in the rose family (Rosaceae).
features
The mat-forming rock spar is an evergreen dwarf shrub that reaches heights of 4 to 12 centimeters. The leaves are usually 7 to 12, rarely from 5 or up to 14 millimeters long, rarely from 1, usually 1.5 to 4 millimeters wide and spatulate to lanceolate. The underside of the leaf is single-nerved. The peduncle is 2 to 8 inches long, the inflorescence 2 to 5 inches. The calyx lobes are lanceolate-triangular. There are 20 stamens.
The flowering period extends from June to August.
Occurrence
The mat-forming rock spar occurs in the western USA in rock crevices and on sloping rock corridors on limestone and granite.
use
The mat-forming rock spar is rarely used as an ornamental plant for rock gardens and alpine houses .
supporting documents
- Eckehart J. Jäger, Friedrich Ebel, Peter Hanelt, Gerd K. Müller (eds.): Rothmaler excursion flora from Germany. Volume 5: Herbaceous ornamental and useful plants . Spectrum Academic Publishing House, Berlin Heidelberg 2008, ISBN 978-3-8274-0918-8 .
