BARTRAM: BOTANIZING IN SOUTHERN ARIZONA 241 
fruit in a sufficiently good state of preservation to make them 
easily recognizable. 
For assistance in the determination of many of the species 
I am much indebted to the kindness of Dr. Paul C. Standley. 
CHEILANTHES LINDHEIMERI Hook. Frequent on arid ledges and rocky 
slopes. 
CHEILANTHES MYRIOPHYLLA Desv. Less common than the preceding, 
EILANTHES PRINGLEI Davenp. The finely dissected delicate fronds 
of this species distinguished it at once from its associates in this region. In- 
frequent in shaded rock clefts on the lower slopes. 
NTHES WricHTI Hook. Infrequent but re recognized by 
the smooth green pinnules and lustrous pee sti 
AENA HooKerr D. C. Eaton. Rather common among rocks 
on arid ‘hillsides The dahil outline of the fronds and the bright 
yellow color of the lower surface are unmistakable marks.: 
NOTHOLEANA SINUATA (Sw.) Kaulf. Frequent among dry rocks on the 
lower mountain slopes. 
OLAENA SINUATA INTEGERRIMA Hook. More widely distributed 
than the cuca form of the sp 
NOTHOLAENA BONARIENSIS Ot C. Chr. Rare among rocks near 
the mouth of Sabino Canyon. 
NoTHOLAENA LEMMoNniI D. C. Eaton. Abundant on a dry rocky slope 
in the mouth of Sabino Canyon but not found elsewhere. 
PELLAEA MUCRONATA D. C. Eaton. Ledges a crevices in the re 
This seems to be the commonest fern of the regio 
ELAGINELLA ARIZONICA Maxon. Arecently described species forming 
flat green mats among rocks in the arroyos 
SELAGINELLA RUPICOLA Underw. The grayish color and erect habit 
are good field marks for this species. Near the mouth of Sabino Canyon 
it forms dense turfy mats over the dry ledges 
ERUS SCOPULORUM Sarg. Bank of stream near ov mouth of 
Sabino iano pudeane a stray from the higher ridge 
EPHEDRA TRIFURCATA Torr. Abundant along washes in the gravel 
plains 
eeceak ANTISYPHILITICA Meyer. Rare in an arroyo near Pictu 
Rocks. The slender flagellate stems give this plant a very different as 
from the more common, stiffly erect, E. trifurcata. 
Epuepra viripis Coville. Collected but once in the dry foothills at 
Robles Pass 
ANDROPOGON SACCHAROIDES Sw. Frequent on the plain and foothill. 
HETEROPOGON conTOoRTUS (L.) Roem. & Schult. More confined to the 
foothill slopes. 
