NO. 2 gentry: LAND PLANTS 169 



was In error, although I have not seen the specimens he cites. This is not 

 surprising since Rose's original descriptions are inadequate. Leonard of 

 the United States National Herbarium, who has access to the type col- 

 lections, has kindly determined Dawson's Guaymas collections. With his 

 assistance I believe I am correct in restricting R. peninsularis from the 

 Sonora flora until such time as it may be found in typical form. 



RuELLiA LEUCANTHA Brge., Zoe 5:109. 1901. 



Punta Frailes, February 16, Dawson 1135. 



Endemic to the postinsular Cape District. It is a suffrutescent peren- 

 nial with white flowers and densely tomentose leaves. It is rare in col- 

 lections. 



RuELLiA PENINSULARIS (Rose) Jtn., Proc. Calif. Acad. Sci. IV, 

 12:1172.1924. 



San Jose del Cabo, February 17, Dawson 1163. 



Southern part of Baja California; the type from mesas about La Paz. 

 Plantaginaceae 



Plantago insularis fastigiata (Morris) Jeps., Man. Fl. PL 

 Calif. 956. 1925. 



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



A low villous annual common to the deserts of the California Gulf 

 Region. 



RUBIACEAE 



HousTONiA ASPERULOiDES (Benth.) Gray, Proc. Am. Acad. Sci. 

 5:158. 1860. 



Houstonia Brandegeana Rose, C.N.H. 1:70. 1890. 



Punta Frailes, February 16, Dawson 1113, 1132. San Jose del Cabo, 

 February 17, Dawson 1187. 



Apparently limited to southern Baja California. A finely cut annual 

 with purple flowers. Although the flowers on the specimens from Punta 

 Frailes are smaller than those described for the species (3 to 4 mm high), 

 the calyx is sparsely strigose and the lobes acute, two characters agreeing 

 with H. asperuloides, and there are no other significant differences. 



Houstonia mucronata (Benth.) Rob., Proc. Am. Acad. Sci. 45: 

 401. 1910. 



San Francisco Island, March 9, Rempel 110, beach dunes. 



Southern Baja California and the adjacent islands; type from Mag- 

 dalena Bay. It forms a low shrubby bush 2 to 9 dm high with white 

 corollas which turn black on drying. Reported by Johnston to be abun- 

 dant on some of the islands in the southern part of the gulf. 



