NO. 2 gentry: land plants 127 



Puerto Escondido, February 9, Dawson 1095. 



Known only from Carmen Island and the adjacent peninsula; type 

 from Carmen Island. Annual diffuse herb with sparsely puberulant 

 stems and small broadly cordate leaves 6 to 8 mm long, 6 to 9 mm wide. 

 The Dawson collection disagrees with Wiggins' description in having 

 the sepals acute rather than retuse to rounded and the claw is unusually 

 long. Otherwise it agrees and the clawed long-lobed petals are particu- 

 larly diagnostic of the species. 



Papaveraceae 



Argemone mexicana L., Sp. PI. 508. 1753. 



San Jose del Cabo, February 17, Dawson 1223. 



Widely adventive in the tropics of both hemispheres, especially in 

 waste lands; type from Mexico. This specimen is typical of the pale 

 yellow-flowered annual commonly aggressive in the fallowing fields of 

 western Mexico; flowers, spring. 



EsCHSCHOLTZiA MiNUTiFLORA Wats., Proc. Am. Acad. Sci. 11 :122. 

 1876. 



Puerto Refugio, Angel de la Guardia Island, March 20, Rempel 269. 



The species is widely distributed in the southewestern deserts, reach- 

 ing its southern limits in central Sonora and middle Baja California. 

 The above collection is the first reported from the California Gulf 

 Islands. It is a small slender annual 20 cm tall with reddish root, sea- 

 pose, the dried petals only 4 mm long. 



Cruciferae 



Dryopetalon Palmeri (Wats.) O. E. Schultz in Notizbl. Bot. 

 Gart. Berlin 10:561. 1929. 



Puerto Escondido, February 11, Dawson 1089. Agua Verde Bay, 

 Baja California, March 10, Rempel 140a (fruiting). 



Winter annual of southern Baja California. 

 Lyrocarpa linearifolia Rollins sp. nov. 



Herba perennis suff ruticosa ; caulis ramosis stramineis pubescentibus ; 

 foliis linearis sparse lobatis vel integris pubescentibus 1-4 cm longis, 1-3 

 mm latis; siliquis obcordatis pubescentibus 4-10 mm longis, 5-12 mm 

 latis; stigmatibus sessilibus. 



Suffrutescent perennial; older stems ash gray, glabrate, striate, bark 

 exfoliating in longitudinal strips, young stems densely pubescent, terete, 

 reddish-purple beneath the white trichomes ; leaves persistent, subf ascicu- 

 late, densely pubescent with white substellate trichomes, sparingly lobed 

 with 1 to 3 pairs of small lobes or sometimes entire, linear, scarcely dif- 



