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Wasowski, Sally and Andy
Mandevilla macrosiphon (Torr.) Pichon
Plateau rocktrumpet, Longtube trumpet flower, Flor de San Juan, Rock trumpet
Synonym(s): Macrosiphonia lanuginosa var. macrosiphon, Macrosiphonia macrosiphon, Telosiphonia macrosiphon
USDA Symbol: mama5
USDA Native Status: L48 (N)
This plant is 6–12 inches tall. The leaves grow close together on the stem. On some plants, they are almost round with broad scallops; on others they have entire margins with a point at the tip. All of them are fleshy with a covering of fine hair on both sides and prominent veins and midrib. A single flower grows at the end of a stem. The flower tube is 2–5 inches long gradually spreading to 5 creamy-white petal-like lobes; the whole flower is about 1 1/2 inches across.
Plant CharacteristicsDuration: Perennial Habit: Herb Leaf Arrangement: Opposite Leaf Complexity: Simple Leaf Shape:
Linear , Oblong Leaf Margin: Entire Inflorescence: Raceme Fruit Type:
Follicle Size Notes:
6-12 in height. Size Class:
Bloom InformationBloom Color: White
Bloom Time: May , Jun , Jul , Aug , Sep
Bloom Notes: Flowers white or pink-tinged.
DistributionUSA: TX Native Distribution:
Southwestern Texas and northern Mexico. Native Habitat:
Dry rocky or open slopes.
Growing ConditionsWater Use: Low
Light Requirement: Part Shade
Soil Moisture: Dry
Soil Description: Rocky, gravelly, limestone-based.
garden, Rocky hillside, Rock gardens Conspicuous Flowers:
PropagationPropagation Material: Seeds
Record Last Modified: 2013-04-05
Research By: JAM