168 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 13 



the mountains of Oaxaca. It forms a low irregularly branched shrub 

 with rather thin ovate to lanceolate acuminate leaves and short racemes 

 of bilabiate red flowers in the spring. Closely related to /. mexicana, 

 which occurs in the same region, but distinguished from it by the floral 

 bracts which equal or exceed the calyx, while in /. rnexicana they are 

 shorter than the calyx. Both plants belong with the Thorn Forest rather 

 than with the desert, and their occurrence in the latter is marginal and 

 restricted to bottomlands of overflow or the more moist canyon slopes. 



JusTiciA HIANS Brge., U. C. Publ. Bot. 6:194. 1915 and Proc. 

 Calif. Acad. Sci. II, 2:194. 1889. 



San Jose del Cabo, February 17, Daivson 1200. 



Low suffrutescent herb rarely collected and apparently a postinsular 

 endemic of the Cape District of Baja California. 



RuELLiA CALIFORNICA (Rosc) Jtn., Proc. Calif. Acad. Sci. IV, 

 12:1171. 1924. 



Guaymas, January 23, Dawson 1002. San Carlos Bay, February 8, 

 Dawson 1073a. Agua Verde Bay, Baja California, March 10, Rempel 

 133, 138, rocky hillside. Island in Concepcion Bay, March 16, Rempel 

 193. 



Southern part of the gulf region, mainly on the rocky slopes of the 

 coastal cerros; type from Santa Rosalia, Baja California. It forms a low 

 shrub with twiggy branches often in dispersed small colonies with showy, 

 lavender, campanulate, caducous flowers about 3 cm long. The foliage 

 is vernicose or glutinous with dull, sparse, blunt or capitate hairs, erect 

 or impacted in the surface excretion. 



The species is closely related to R. peninsularis, from which it is dis- 

 tinguished by the longer, more attenuate, calyx lobes bearing clavate 

 glandular "hairs." The indument on R. peninsularis although glandular 

 is not clavate. Johnston's attempt to separate these two species on foliage 

 characters alone is not altogether satisfactory ( Proc. Calif. Acad. Sci. IV, 

 12:1172), since both species are glandular and glutinous, nor is the 

 foliage of R. peninsularis glabrate. The varnish tends to accumulate on 

 the leaf surface with age and in time may submerge the ''hairs" in a 

 glutinous film, a condition apparently mistaken by Johnston for glabrate. 

 It is common to both species. R. peninsularis appears to be limited to the 

 peninsula, since all the collections I have reviewed from the mainland 

 are referrable to R. calif ornica. 



Johnston assigned some Guaymas collections to R. peninsularis, but 

 in view of the criteria used in separating the two species, I believe he 



