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Marcus, Joseph A.
Thamnosma texana (A. Gray) Torr.
Dutchman's breeches, Ruda del monte, Rue of the mountains, Texas desert-rue
USDA Symbol: thte2
USDA Native Status: L48 (N)
A low, aromatic plant with a woody base and thin, herbaceous stems up to 1 foot 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 Breeches.
Plant CharacteristicsDuration: Perennial Habit: Herb Fruit: Size Class:
Bloom InformationBloom Color: White , Yellow , Purple
Bloom Time: Mar , Apr , May , Jun
, 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
PropagationPropagation Material: Softwood Cuttings
Description: Cut new growth when most tender, before budding in spring, also can have new growth in fall.
Butterflies and Moths of North America (BAMONA)
is a larval host and/or nectar source for:
Herbarium Specimen(s)NPSOT 0192
Collected Mar. 15, 1992 in Comal County by Mary Beth White
Record Last Modified: 2007-08-31
Research By: LAL, LAS