NO. 2 GENTRY : LAND PLANTS 165 



age in palm canyon. Canyon above Puerto Escondido, March 13, Rempel 

 161 J on damp rocks. 



These collections represent two species, neither of which I can place 

 satisfactorily. Dawson 1104 is an erect herb about 15 cm high with rela- 

 tively large orbicular coarsely dentate leaves, strongly 3-veined from the 

 base, the calyces prominently red-spotted, but the spots fading on the 

 fruiting calyces. 



The plant represented by the Rempel 161 is a diminutive, procum- 

 bent, finely cut herb with yellow flowers forming mats in wet or moist 

 sand or on rocks by seeps and pools in the canyon bottom. It is to be 

 expected in other localities of the Sierra Giganta. It has also been col- 

 lected in the same locality; Gentry 3772 and Johnston 4113. The latter 

 collection was referred by Grant (Ann. Mo. Bot. Gard. 11 :186. 1924) 

 to Mbnuliis dentilobus, described from Nacari, Sonora by Robinson and 

 Fernald. While I have not seen Johnston's collection, those of both 

 Rempel and Gentry fail to show the laciniatelj^-lobed corollas character- 

 istic of M. dentilobus. Though the Puerto Escondido plants are clearly 

 related to M. dentilobus, they appear worthy of taxonomic recognition. 

 Unfortunately, none of the material at hand is worthy of type designa- 

 tion. Future collectors should make it a point to secure a large series of 

 good material of both of these rare Mimulus, not otherwise known. 



MoHAVEA CONFERTIFLORA (Benth.) Heller, Muhl. 4:48. 1912. 



Puerto Refugio, Angel de la Guardia Island, March 20, Rempel 270. 



Widely but infrequently scattered through the deserts from southern 

 Nevada south to Angel de la Guardia Island ; not known from Sonora. 

 The type locality is uncertain. A diminutive winter annual with large 

 showy flowers. 



Stemodia arizonica Penn., Notul. Nat. Acad. Sci. Phil. 43:1-10. 

 1940. 



Canyon above Puerto Escondido in the Sierra Giganta, March 13, 

 Rempel 158, in canyon bottom. 



Hydrophytic herb, often with the older branches decumbent. Along 

 the perennial streams from low to middle elevations in the mountains 

 and foothills of northwestern Mexico and adjacent United States. 



Martyniaceae 



Martynia altheaefolia Benth., Bot. Voy. Sulph. 37. 1844. 



Punta Frailes, February 16, Dawson 1134. 



Widely scattered in the sandy deserts from Texas to California, 



