Anacacho Orchid Trees. Bauhinia lunarioides ( B congesta ). Pea Family ( Fabaceae ) Anacacho Orchid Tree. Also Called Pata de Vaca, Orchid Tree, Bauhinia congesta, Bauhinia jermyana, Casparea congesta, Casparea jermyana. We wish to thank Wikipedia, the free encyclopedia for some of the information on this page. We share images and information with Wikipedia. Semi-evergreen to deciduous tree sometimes placed in the Caesalpiniaceae family. A small graceful tree which holds its leaves over the winter (during mild winters). In the spring, white to pink orchid - like fragrant flowers cover the tree. Flushes of blooms follow our heavy Summer or Fall rains. This plant is attractive to bees, butterflies and/or birds. Anacacho Orchid Tree is moderately fast growing if given regular watering but it is also tough enough to withstand extreme drought. Quick Notes: Height: Up To 18 feet tall, 14 - 18 feet spread. Trunk: 3 to 8 inches in diameter. Bark: Grayish-brown, thin, smooth or scaly. Flowers: White to pink orchid - like, very fragrant. Blooming Time: Late March - April. Seed Pod: Flat dark brown seedpods. Seeds: Elliptical flattened shiny dark brown, almost black seeds. Leaves: Gray - green, butterfly - shaped, leaves with 2 leaflets connected in the middle. Found: Native to the Anacacho Mountains of Texas. Also found in northeastern Mexico in Coahuila, Nuevo Leon, & Tamaulipas. The USDA claims it is native to the USA (TX). Elevation: Native below 1,349 feet. Usually about 400 feet. Hardiness: 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 Habitat: In its native growth areas it is found in rocky limestone canyons, needs well-drained soils. Xeriscape ornamental in lower elevations in the Phoenix and Tucson areas of Arizona. Miscellaneous: Photos Taken March 23, 2006 Arrowhead Ranch, Glendale, Arizona. A low water use landscaping plant in the Phoenix and Tucson areas.