Physical Setting
Climate
Adaptations
Tucson Plants
Tucson Animals
External Resources
Physical Setting
Climate
Adaptations
Tucson Plants
Tucson Animals
External Resources
PlantsNative TreesNative ShrubsNative CactusesWildflowersOther Plants
Shrubs: | brittlebush | burroweed | triangleleaf bursage | chuparosa | creosote bush | desert broom | ephedra | fairy duster | jojoba | desert lavender | limberbush | ocotillo | ragged rock flower | canyon ragweed | ratany | sotol | trixis | turpentine bush | Berlandier wolfberry | desert zinnia |

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Ratany (Krameria spp)
ratanyDESCRIPTION: Shrub to 3'. Branches gray. Stems are spineless but taper to a sharp point. Leaves are inconspicuous, simple, smooth-edged to lobed, grayish-green, haired to 1/2" long. Flowers bloom April - Oct. and are violet, with 5 petals. Fruit is fuzzy greenish-white ball with barbed spines. White Ratany (K. grayi) has barbs only on the tips of fruit spines (pictured here) whereas Range Ratany (K. erecta) has barbs along entire fruit spine. Krameriaceae (Ratany) Family.
NATURAL HISTORY: Ratany photosynthesize, but they also parasitize the roots of other plants (esp. Triangleaf Bursage and Creosote Bush) (partial parasite). Ratany offer their bee pollinators oil instead of nectar. The oil bees (Centris) acquire nectar from other plants, but scrape off the oil from ratany to combine with pollen from other plants to feed their larvae.

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Dept. of Biology
West Campus
Pima Community College
last updated February 23, 2001