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



1. Lewisia brachycalyx Engelm. in A. Gray, Amer. Acad. Arts and 



Sci. Proc. 7:400. 1868. 



Oreobroma brachycalyx Howell, Erythea 1: 31. 1893. 



Coconino, Gila, and Yavapai Counties, 5,000 to 7,000 feet, among 

 oaks, junipers, and yellow pines, April to May. Southern Utah, 

 Arizona, and southern California. 



2. Lewisia pygmaea (A. Gray) Robinson in A. Gray, Syn. Fl. I 1 : 



268. 1897. 



Talinum pygmaeum A. Gray, Amer. Jour. Sci. ser. 2, 33: 407. 



1862. 

 Oreobroma pygmaeum Howell, Erythea 1 : 33. 1893. 



Tsugie, Navajo County (Wetherill 105, 276), Kaibab Plateau and 

 north rim of Grand Canyon, Coconino County, 8,000 to 9,000 feet 

 (Mead 259, Forest Service 62611), June. Montana to Washington, 

 Arizona, and California. 



4. CALYPTRIDIUM 



Small, glabrous, somewhat succulent annual herbs; stem leaves 

 alternate; flowers small, ephemeral, in scorpioid racemes; petals 2 to 4, 

 pink or white; stamens 1 to 3. 



Key to the species 



1. Inflorescence rather loose, the flowers not closely imbricate, or so only at ends 

 of the branches; sepals 1.5 to 2.5 mm. long, one-fourth to one-third as long 

 as the capsule; petals 2 or 3; stamen 1; capsules somewhat falcate. 



1. C. MONANDRUM. 



1. Inflorescence dense, the flowers closely imbricate; sepals 3 to 4 mm. long, fully 

 half as long as the capsule; petals 4; stamens 1 to 3; capsules straight or 

 nearly so 2. C. parryi. 



1. Calyptridium monandrum Nutt. ex Torr. and Gray, Fl. North 



Amer. 1: 198. 1838. 

 Mohave County to Pinal, Santa Cruz, Pima, and (doubtless) Yuma 

 Counties, 4,000 feet or lower, common on desert plains and slopes, 

 March to April. Arizona, California, and Baja California. 



2. Calyptridium parryi A. Gray, Amer. Acad. Arts and Sci. Proc. 22: 



285. 1887. 



Canoa to Arivaca, and Rosemont, Pima County (Griffiths 3556, 

 4125), Nogales, Santa Cruz County (Peebles and Fulton 11454), 

 3,500 to 4,000 feet, March to April. Southern Arizona and southern 

 California. 



The seeds are described as dull and minutely roughened in C. parryi, 

 whereas in the specimens from Nogales they are smooth and 

 shining. The species apparently varies in this character. 



5. CLAYTONIA. Springbeauty 



Plant a small glabrous perennial with a large corm ; stem leaves one 

 pair, opposite; flowers few, in loose racemes, rather conspicuous; 

 sepals 2, persistent; petals 5, pale pink; style 3-cleft; capsule 3-valved. 



1. Claytonia rosea Rydb., Torrey Bot. Club Bui. 31: 404. 1904. 



Near Oak Creek Canyon (Coconino County), Sierra Ancha and 

 Mazatzal Mountains (Gila County), 5,500 to 7,000 feet, moist rich 



