636 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



July and August. South Dakota to Washington, New Mexico, 

 Arizona, and southern California. 



3. Gayophytum racemosum Torr. and Gray, Fl. North Amer. 1: 514. 

 1840. 

 Coconino County, 6,500 to 8,500 feet, open places in pine forests, 

 June to August. Colorado to Washington, northern Arizona, and 

 southern California. 



9. GAURA9 G 



Annual or perennial herbs, with red to white, rather irregular, 4- 

 merous flowers; stamens declined, all fertile, 8 in number; stigma 

 deeply lobed, with a cuplike indusium at base; fruit woody, small, 

 indehiscent, 1- to 4-seeded. 



Key to the species 



1. Flowers small, the petals 1.5 to 2 mm. long, the sepals 1.5 to 3 mm. long; 

 anthers oval, 1 mm. long; tall weedy biennial or winter annual, the stem 



mostly simple below and branched above 1. G. parviflora. 



1. Flowers larger, the petals 4 to 6 mm. long, the sepals 4 to 8 mm. long; anthers 



linear-oblong, 2 to 5 mm. long; low perennials, the stem much branched 



from the base (2) . 



2. Body of the fruit ovoid-pyramidal, widest near the narrow base and winged 



almost throughout, transversely wrinkled on each face; plants 40 to 90 



cm. high; basal leaves sinuate-dentate, 4 to 10 cm. long. 



2. G. GRACILIS. 



2. Body of the fruit widest at or above the middle, winged only beyond this 



point, the basal portion terete and thick, not with transverse wrinkles; 



plants mostly 10 to 40 cm. high; basal leaves subentire, 1.5 to 3.5 cm. 



long 3. G. coccinea. 



1. Gaura parviflora Dougl. ex Hook., Fl. Bor. Amer. 1: 208. 1834. 

 Navajo, Coconino, Yavapai, Greenlee, Cochise, and Pima Counties, 



2,000 to 6,000 feet, waste and disturbed places, June to October. 

 Mississippi Valley to Washington and northern Mexico; Argentina. 



The typical form has the ovary and capsule glabrous, and the 

 hypanthium minutely puberulent. The f. glabra Munz, with the 

 hypanthium also glabrous, has been collected in Arizona at Kirkland, 

 Yavapai County (Peebles et al. 4244), and in Ramsey Canyon, Hua- 

 chuca Mountains (Jones 24941). The var. lachnocarpa Weatherby, 

 with the hypanthium, ovaries, and capsules short-pubescent, occurs 

 in Yavapai, Mohave, Gila, Pinal, Maricopa, Pima, and Yuma Coun- 

 ties, mostly below 3,000 feet, March to June. 



2. Gaura gracilis Woot. and Standi., Contrib. U. S. Natl. Herbarium 



16: 153. 1913. 



Gaura podocarpa Woot. and Standi., ibid. 

 Gaura strigillosa Woot. and Standi., ibid. 154. 

 Gaura brassicacea Woot. and Standi., ibid. 152. 



Nearly throughout the State except the most western counties, es- 

 pecially abundant about Flagstaff and in the mountains of Cochise 

 County, 2,500 to 7,500 feet, canyons, along roadsides, etc., May to 

 October. Western Texas to Arizona and northern Mexico. 



The typical form has the hypanthium and calyx strigulose to gla- 

 brous. Another form, with the hypanthium and calyx bearing short 

 gland-tipped hairs, f. glandulosa (Woot. and Standi.) Munz, has much 



e 6 Reference: Munz, P. A. studies in onagraceae— XL a revision of the genus gaura. Torrey 

 Bot. Club Bui. 65: 105-122, 211-228. 1938. 



