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Schroeder, Susan

Thamnosma texana

Thamnosma texana (A. Gray) Torr.

Texas Desert-rue, Dutchman's Breeches, Rue Of The Mountains, Ruda Del Monte

Rutaceae (Rue Family)

Synonym(s):

USDA Symbol: THTE2

USDA Native Status: L48 (N)

A low, aromatic plant with a woody base and thin, herbaceous stems 12-20 inches tall. Grows in open and brushy areas in shallow soil over limestone, more common west of The Hill Country. Leaves small, narrow, up to 3/4 inch long by 1/16 inch wide, dotted with glands visible under a 10x hand lens. Flowers small, 1/8 to 3/16 inch wide, arranged along the upper half of the stems, appearing from March to June. Fruit a 2-lobed capsule having an inflated appearance and giving rise to the name "Dutchman's Breeches."

From the Image Gallery

112 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Fruit Type: Capsule , Caryopsis
Size Notes: Up to about 20 inches tall.

Bloom Information

Bloom Color: White , Yellow , Purple
Bloom Time: Mar , Apr , May , Jun

Distribution

USA: AZ , CO , NM , TX
Native Habitat: Rocky meadows and slopes over limestone in the Edwards Plateau, into south Texas and west to Trans-Pecos Texas. Loam, sand, limestone.

Growing Conditions

Water Use: Low
Light Requirement: Sun
Soil Moisture: Dry

Benefit

Fragrant Flowers: yes
Fragrant Foliage: yes
Attracts: Butterflies
Larval Host: Eastern Black Swallowtail.
Deer Resistant: Moderate

Butterflies and Moths of North America (BAMONA)

Black Swallowtail
(Papilio polyxenes)

Larval Host

Learn more at BAMONA

Propagation

Propagation Material: Softwood Cuttings
Description: Cut new growth when most tender, before budding in spring, also can have new growth in fall.

From the National Organizations Directory

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

Lady Bird Johnson Wildflower Center - Austin, TX
National Butterfly Center - Mission, TX

Herbarium Specimen(s)

NPSOT 0192 Collected Mar. 15, 1992 in Comal County by Mary Beth White

1 specimen(s) available in the Digital Herbarium

Bibliography

Bibref 635 - Lewis Clark's Field Guide to Wild Flowers of the Mountains in the Pacific Northwest (2003) Clark, L.J. & J.G.S. Trelawny
Bibref 186 - Native Gardens for Dry Climates (1995) Wasowski, S. & A. Wasowski
Bibref 851 - Tyler's Herbs of Choice: The Therapeutic Use of Phytomedicinals (1999) Robbers, J. E.; V. E. Tyler
Bibref 411 - Vanishing Heritage: Wildflowers of Cape Cod (2003) DiGregorio, M. & J. Wallner

Search More Titles in Bibliography

Web Reference

Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Thamnosma texana in USDA Plants
FNA: Find Thamnosma texana in the Flora of North America (if available)
Google: Search Google for Thamnosma texana

Metadata

Record Modified: 0000-00-00
Research By: LAL, LAS

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