598 CONTEIBUTIONS EEOM THE NATIONAL HEKBAETUM. 



Range: Southwestern New Mexico to Arizona and Mexico. 



New Mexico: Mangas Springs; Lordsburg; Big Hatchet Mountains. Dry hills and 

 mesas. 



3. DIAPEDIUM Konig. 



Glabrous perennial herb with opposite petiolate lanceolate leaves and axillary 

 few-flowered peduncles; flowers subtended by large cordate bracts; stamens 2, barely 

 equaling the lips; ovules 2 in each cavity. 



1. Diapedium torreyi (A. Gray) Woot. & Standi. 

 Dicliptera toireyi A. Gray, Proc. Amer. Acad. 20: 309. 1885. 

 Type locality: Arizona. 



Range: Southwestern New Mexico and adjacent Arizona and Mexico. 

 New Mexico: Guadalupe Canyon (Mearns 2037). 



4. CARLOWRIGHTIA A. Gray. 



Slender branched glabrous perennial herb with opposite linear leaves; flowers 

 axillary; corolla deeply 4-parted, with a short tube; stamens 2, nearly equaling the 

 corolla lobes; capsules ovoid, acuminate, on slender stipes; seeds few. 



1. Carlowrlghtia linearifolia (Torr.) A. Gray, Proc. Amer. Acad. 13: 364. 1877. 



Schaiieria linearifolia Torr. U. S. & Mex. Bound. Bot. 123. 1859. 



Type locality: "Rocks at the mouth of the Great canon of the Rio Grande, and 

 on the Burro mountains," Texas and New Mexico. 



Range: Western Texas to southern Arizona and southward. 



New Mexico: Twenty miles north of Rincon; Dog Spring; mesa west of the Rio 

 Grande, near Mesilla; Organ Mountains. Dry, rocky hills and mesas, in the Lower 

 and Upper Sonoran zones. 



5. STENANDRIUM Nees. 



Perennial short-stemmed herb with hirsute foliage; leaves approximate, entire; 

 flowers in terminal bracted spikes, rose purple; corolla with a slender tube and oblique 

 5-lobed limb; stamens 4, included; ovules 2 in each cavity. 



1. Stenandrium barbatum Torr. & Gray, U. S. Rep. Expl. Miss. Pacif. 2^: 1*58. 

 pi. 4. 1855. 

 Type locality: "On the Pecos," Texas or New Mexico. 

 Range: Southern New Mexico, western Texas, and northeastern Mexico. 

 New Mexico: Guadalupe Mountains (Wooton). Dry hills, in the Lower Sonoran 

 Zone. 



6. RUELLIA L. 



Low shrub, 30 cm. high or less, with thick obovate petiolate ciliate leaves and few 

 BoUtary axillary flowers; calyx lobes linear; corolla white, with a long tube and a 

 nearly regular Umb; stamens 4, included; ovules 3 to 10 in each cavity. 



1. RueUia parryi A. Gray, Syn. Fl. 2': 326. 1878. 

 Dipteracanthus suffruticosus Torr. U. S. & Mex. Bound. Bot. 122. 1859, not Ruellia 



suffruticosa Roxb. 1814. 

 Type locality: Presidio del Norte, Texas. 



Range: Western Texas and southern New Mexico to northeastern Mexico. 

 New Mexico: Dark Canyon, Guadalupe Mountains {Wooton). Dry hills. 



