110 I. M. JOHNSTON 



Menzelia congesta T. & G. var. Davidsoniana (Abrams) Macbr. But a single col- 

 ony of this was seen. It grew in gravelly ground, in the lower portion of the 

 pine belt, alt. 5750 ft. in Coldwater Fork Lytic Creek. (No. 2059.) 



DATISCACE.E 



Datisca glomerata (Presl) B. &, H. Occasional in wet ground in the Lower Transi- 

 tion Zone. More common at lower levels. 



CACTACE.E 



Opuntia occidentalis Engelm. A common mesa species along the south base of 

 the mountains, which commonly ascends the canons and becomes frequent 

 on dry, open, sandy canon floors in the Upper Chaparral Belt. From these 

 situations it often penetrates a short distance up into the Lower Transition 

 Zone. 



Opuntia basilaris Engelm. & Bigcl. A few plants growing with Piaus monophylla 

 at about 6500 ft. alt. in the upper part of North Fork Lytle Creek. Lower 

 part of the Transition Zone. 



ONAGRACEiE 



Zauschneria californica Presl, var. latifolia Hook. Common in dry ground un- 

 der the pines, especially in the Upper Transition Zone. (No. 1586.) 



Chamaenerion angustifolium Scop. Locally abundant at two station in the Upper 

 Transition Zone; Coldwater Fork Lytle Creek at 7000 ft. alt. and in a small 

 side canon of Prairie Fork, also at 7000 ft. (No. 1396.) 



Epilobium glaberrimum Barbey. Occasional in springy ground, apparently con- 

 fined to the Upper Transition Zone. (No. 1600, 2075.) 



Epilobium ursinum Parish. The common Epilobium of the Upper Transition 

 Zone. Det. S. B. Parish. (No. 1664.) 



Epilobium paniculatum Nutt. A few plants in dry ground at the Native Son 

 Mine. 



Gayophytum ramosissimum T. & G. Very common in dry, open ground in the 

 Lower Transition Zone. (Nos. 14S2, 1533.) 



Gayophytum caesium T. &. G. Practically confined to the Upper Transition Zone 

 on the north side of the mountains, extending over to the south side only 

 at the head of San Antonio Canon. (No. 1695.) 



Clarkia rhomboidea Dougl. Dry ground in the lowest parts of the Transition 

 Zone. Very common at the mouth of Icehouse Cation. (No. 1404.) 



Omagra Hookeri (T. & G.) Small. Frequent in damp ground along streams, as- 

 cending to 8000 ft. alt. in the Upper Transition Zone. 



Sphaerosiigmacontorhon (Dougl.) walp. Occasional in dry sandy ground about 

 the Native Son Mine, alt. ."000 ft. 



ARALIACEjE 



Aralia ralijornica Wats. Occasional in moist shaded places in the Lower 

 Transition Zone. Much more common in the Upper Chaparral Belt. 



