NO. 2 gentry: land plants 161 



CoLDENiA Palmeri Gray, Proc. Am. Acad. Sci. 8:292. 1870. 



Los Angeles Bay, March 19, 20, Rempel 235, 255. 



In sandy soils through the northern part of the gulf region, where 

 it forms a low suffrutescent mat or mound with parts of the older stems 

 exfoliating a white cortical layer. 



Heliotropium curassavicum L., Sp. PI. 130. 1753. 



Punta Frailes, Cape District, February 16, Dawson 1138. 



Coastal lowlands throughout most of tropical and subtropical America. 



Heliotropium Hintonii Jtn., Jour. Arn. Arb. 21 :50. 1940. 



Punta Frailes, February 16, Dawson 1120, 1176. San Jose del Cabo, 

 February 17, Dawson 1185, 1216. 



Known from the mountains of west central Mexico and from the 

 Cape District of Baja California. It is a low suffrutscent 3 to 4 dm 

 high with elongating racemes of small white flowers, the stems leafy with 

 strongly pubescent linear-lanceolate leaves 15 to 25 mm long. 



Labiatae 



Hyptis Emoryi Torr. in Ives, Rep. Col. River 20. 1861. 



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

 276. Near Guaymas, Sonora, February 9, Dawson 1081. 



Found throughout the California Gulf Region ; type from the Colo- 

 rado River country. It is one of the regular opportunists among the 

 shrubs along rocky arroyos and is able to withstand, or at least to endure 

 as a species, the grinding flash floods that arise with torrential desert 

 rains. Guaymas appears to be about its southern limit on the Mexican 

 mainland. A variant of the species occurs about Guaymas and was des- 

 cribed by Watson as a species, H. Palmeri, but later was reduced to a 

 variety by Johnston, H. Emoryi Palmeri. It may well be a postinsular 

 endemic. Standley (C.N.H. 23:1276. 1924) lists Hyptis Emoryi from 

 Tepic, but his statement is in part based on the related H. albida Kunth., 

 which is known to range through Nayarit. 



Hyptis laniflora Benth., Bot. Voy. Sulph. 42, pi. 20. 1844. 



Punta Frailes, February 16, Dawson 1124. San Jose del Cabo, Feb- 

 ruary 17, Dawson 1183. 



Southern Baja California and adjacent islands; type from Cape San 

 Lucas. 



The material from Punta Frailes has calyx lobes shorter than usual, 

 scarcely half as long as the tube, and the lanate pubescence of the calyx 

 is much denser than on the San Jose del Cabo specimen. 



