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Thamnosma texana (A. Gray) Torr.
Texas Desert-rue, Dutchman's Breeches, Rue Of The Mountains, Ruda Del Monte
Rutaceae (Rue Family)
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
Plant CharacteristicsDuration: Perennial
Fruit Type: Capsule
Size Notes: Up to about 20 inches tall.
Bloom InformationBloom Color: White , Yellow , Purple
Bloom Time: Mar , Apr , May , Jun
DistributionUSA: 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 ConditionsWater Use: Low
Light Requirement: Sun
Soil Moisture: Dry
BenefitFragrant Flowers: yes
Fragrant Foliage: yes
Larval Host: Eastern Black Swallowtail.
Deer Resistant: Moderate
Butterflies and Moths of North America (BAMONA)
Black Swallowtail |
Learn more at BAMONA
PropagationPropagation 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 DirectoryAccording 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
BibliographyBibref 1186 - Field Guide to Moths of Eastern North America (2005) Covell, C.V., Jr.
Bibref 1185 - Field Guide to Western Butterflies (Peterson Field Guides) (1999) Opler, P.A. and A.B. Wright
Bibref 354 - Native & Naturalized Woody Plants of Austin & the Hill Country (1981) Lynch, D.
Bibref 286 - Wildflowers of the Texas Hill Country (1989) Enquist, M.
Search More Titles in Bibliography
Web ReferenceWebref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter
Additional resourcesUSDA: Find Thamnosma texana in USDA Plants
FNA: Find Thamnosma texana in the Flora of North America (if available)
Google: Search Google for Thamnosma texana
MetadataRecord Modified: 2023-02-28
Research By: LAL, LAS