Huachuca Mountain Rocktrumpet. Macrosiphonia brachysiphon, Dogbane Family: ( Apocynaceae ) , Huachuca Mountain Rocktrumpet. Also called: Telosiphonia brachysiphon, Rock Trumpet. We wish to thank Wikipedia, the free encyclopedia for some of the information on this page. We share images and information with Wikipedia. The Huachuca Mountain Rocktrumpet is an erect, evergreen Subshrub, usually roundish, which develops a short stem with a small crown. Its leaves are green, opposite, puberulent, broadly ovate to elliptic, and about 3/4 to 1 1/4 inch long, and 1/4 to 3/4 inch wide. Macrosiphonia brachysiphon flowers are white, trumpet shaped and about 2 - 3 inches long and about 1 1/2 inches wide. It has 2 follicle fruits which are about 5 inches long and covered in red - copper colored hairs. Thes seeds are slightly red, puberulent, and flat, with the margins folded in. Quick Notes: Height: Up to 24 inches tall. Spreads up to 3 feet wide. Flowers: White, trumpet shaped and about 2 - 3 inches long and about 1 1/2 inches wide. Flowering Time: Late March - November. Best Bloom is April - August. Fruit: It has 2 follicle fruits which are about 5 inches long and covered in red - copper colored hairs. Thes seeds are slightly red, puberulent, and flat, with the margins folded in. Leaves: Leaves are gray - green, opposite, puberulent, broadly ovate to elliptic, 3/4 to 1 1/4 inch long, 1/4 to 3/4 inch wide. Found: Native of the USA (AZ, NM, TX). Also found in Northern Mexico: Chihuahua, & Sonora. Found in Southeastern Arizona. Hardiness: USDA Zone 3a: to -39.9 �C (-40 �F) USDA Zone 3b: to -37.2 �C (-35 �F) USDA Zone 4a: to -34.4 �C (-30 �F) USDA Zone 4b: to -31.6 �C (-25 �F) USDA Zone 5a: to -28.8 �C (-20 �F) USDA Zone 5b: to -26.1 �C (-15 �F) USDA Zone 6a: to -23.3 �C (-10 �F) USDA Zone 6b: to -20.5 �C (-5 �F) USDA Zone 7a: to -17.7 �C (0 �F) USDA Zone 7b: to -14.9 �C (5 �F) USDA Zone 8a: to -12.2 �C (10 �F) USDA Zone 8b: to -9.4 �C (15 �F) USDA Zone 9a: to -6.6 �C (20 �F) USDA Zone 9b: to -3.8 �C (25 �F) USDA Zone 10a: to -1.1 �C (30 �F) USDA Zone 10b: to 1.7 �C (35 �F) USDA Zone 11: above 4.5 �C (40 �F) Soil pH requirements: 5.6 to 6.0 (acidic) 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline) 7.9 to 8.5 (alkaline) Sun Exposure: Full Sun Elevation: Usually at 3,700 to 5,800 feet. Can be found from 0 to 5,900 feet. Habitat: Rocky slopes and plains, found in desert grassland, often found on limestone. Miscellaneous: Excellent Xeriscape Landscaping Plant. Flowering Photos Taken April 19, 2008. Arizona-Sonora Desert Museum. Hardy to 15�C.

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