630 MISC. PUBLICATION 4 2 3, U. S. DEPT. OF AGRICULTURE 



nino, Yavapai, and Pinal Counties, 4,500 to 7,000 feet, dry plains and 

 hills, May and June, ranging to Texas and Chihuahua. The var. 

 brevifolia (Engelm.) Munz, which is quite glabrous and has pinnatifid 

 leaves, has been collected in the Lukachukai Mountains, Apache 

 County (Goodman and Pay son 2900a), and at Clifton, Greenlee County 

 (Davidson 240), ranging into New Mexico, Texas, and Chihuahua. 

 The var. leucotricha (Woot. and Standi.) Munz, characterized by being 

 both hirsute and strigulose, apparently is represented by a single 

 collection in this State, on Hualpai Mountain, Mohave County, 4,500 

 feet (Kearney and Peebles 12650), being otherwise known only from 

 central New Mexico. 



11. Oenothera trichocalyx Nutt. ex Torr. and Gray, Fl. North Amer 



1: 494. 1840. 



Known in Arizona only from Beaver Dam Creek, Mohave County 

 (Maguire 4886) . Wyoming, Colorado, Utah, and northwestern Arizona. 



This species, characterized by conspicuously hairy buds and deeply 

 sinuate leaves, is very much like 0. runcinata var. leucotricha in its 

 capsules and pubescence but has a taproot instead of creeping root- 

 stocks. 



12. Oenothera caespitosa Nutt. ex Fraser, Cat. n. 53. 1813; Sims, 



Bot. Mag. 39: pi. 1593. 1813. 



Pachylophis caespitosa Raimann in Engl, and Prantl, Pflanzen- 

 fam. 3 7 : 215. 1893. 



The typical glabrous form of the species is not known in Arizona, 

 but 3 varieties are found there: (1) The var. marginata (Nutt.) Munz, 

 characterized by being villous-hirsute throughout, usually caulescent, 

 the leaves sinuate-pinnatifid, the capsules pediceled, linear-cylindric, 

 with low tubercles, scarcely ridged, 3 to 4 cm. long, is well distributed 

 throughout the State, 3,000 to 7,500 feet, dry stony slopes, April to 

 August, ranging from Colorado and Arizona to Washington and 

 California. (2) The var. montana (Nutt.) Durand, which is acaules- 

 cent, nearly glabrous except for the canescent pubescence on the 

 margins and veins of the leaves, the capsules sessile, not tubercled. 

 about 2 cm. long, with sinuate ridges and occasional cross veins, occurs 

 in Apache, Navajo, and Coconino Counties, 4,500 to 6,500 feet, May 

 and June, ranging from Montana and Oregon to New Mexico and 

 Arizona. (3) The var. australis (Woot. and Standi.) Munz, character- 

 ized by being quite acaulescent, finely cinereous throughout, and with 

 the hypanthium 10 to 18 cm. long, is known from several localities 

 in Cochise County, and is found also in New Mexico. 



13. Oenothera primiveris A. Gray, PL Wright. 2: 58. 1853. 

 Mohave, Greenlee, Pinal, Maricopa, Cochise, Pima, and Yuma 



Counties, below 4,500 feet, dry open deserts, March to May. Texas' 

 to Nevada and California. 



Plant cespitose, with yellow flowers and leaves peculiarly pinnatifid 

 into lanceolate or ovate lobes with rounded teeth or lobes. 



14. Oenothera speciosa Nutt,, Acad. Nat, Sci. Phila, Jour. 2: 119. 



1821. 



Hartmannia speciosa Small, Torrey Bot. Club Bui. 23: 181. 

 1896. 

 Reported from Fort Verde, Yavapai County, by Britton (Trans. 

 N. Y. Acad. Sci. 8: 67. 1889), as having been collected by Mearns 



