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Perityle bisetosa var. scalaris

Perityle bisetosa (Torr. ex A. Gray) Shinners var. scalaris A. Powell

Twobristle Rockdaisy, Twospike Rockdaisy

Asteraceae (Aster Family)

Synonym(s):

USDA Symbol: PEBIS

USDA Native Status: L48 (N)

From the Image Gallery

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Plant Characteristics

Duration: Perennial
Habit: Herb
Leaf Arrangement: Alternate , Opposite
Inflorescence: Head
Size Notes: Up to about 5 inches tall.
Leaf: Leaves opposite below, alternate above. (Webref 3).
Fruit: Fruit is a cypsela (pl. cypselae). Though technically incorrect, the fruit is often referred to as an achene.

Bloom Information

Bloom Color: White
Bloom Time: Apr , May , Jun , Jul , Aug , Sep , Oct , Nov
Bloom Notes: Flowers without ray florets; disk florets white.

Distribution

USA: TX
Native Distribution: Endemic to Brewster County, Texas.
Native Habitat: In limestone rock holes and crevices.

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

NPSOT - Austin Chapter - Austin, TX

Bibliography

Bibref 293 - Manual of the Vascular Plants of Texas (1979) Correll, D. S. & M. C. Johnston

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Web Reference

Webref 3 - Flora of North America (2014) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.

Additional resources

USDA: Find Perityle bisetosa var. scalaris in USDA Plants
FNA: Find Perityle bisetosa var. scalaris in the Flora of North America (if available)
Google: Search Google for Perityle bisetosa var. scalaris

Metadata

Record Modified: 2012-09-17
Research By: Joseph A. Marcus

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