FLORA OF THE SAN ANTONIO MOUNTAINS 79 



POLYPODIACE.E 



Pteris aquilegia L. var. lanuginosa Hook. Common in springy ground in both the 

 Upper Sonoran and Transition Zones. (No. 1617.) 



Cheilanthes Fendlcri Hook. In rock crevices throughout the Transition Zone 

 reaching an altitude of 8500 ft. on Ontario Peak. The plant is much more 

 common in the Upper Chaparral Belt. (Nos. 1594, 1729.) 



Pellcpa Wrightiana Hook var. califomica Lemmon. Frequent in dry rocky ground 

 in the Transition Zone. (No. 1593.) 



Aspidium rigidum Swartz. var. argutum (Kaulf.) Eaton. Very common on cool 

 shaded canon sides in the Lower Chaparral Belt. Less common in the Upper 

 Chaparral Belt, from which it occasionally extends into the Lower Transition 

 Zone. Seen as high as 6500 ft. alt. 



Polystichum rnunitum (Kaulf. ) Underw. Moist cool shaded canons in the Upper 

 Chaparral Belt and occasionally in the Lower Transition Zone. Reaching 

 7000 ft. alt. 



Cystopteris fragilis Bernh. Very moist situations, as rock crevices by water- 

 falls or wet ground on stream banks. Seen at 8250 ft. alt. on the upper 

 edge of Transition Zone. Common in the Upper Chaparral Belt. (No. 

 1619.) 



EQUISETACEyE 



Equisetum Funstoni A. A. Eaton. Occasional along streams in the Transition 

 Zone. Reaching 7000 ft. alt. (No. 1723.) 



SELAGINELLACEiE 



Selaginella Bigelovii Underw. A very common Upper Sonoran species which 

 ascends to the lower levels of the Transition Zone. Collected at 6000 ft. alt. 

 on the west end of Ontario Peak. (No. 1827.) 



Selaginella sp. A selaginella, apparently an undescribed species, is frequent 

 among rocks throughout the Transition Zone. Especially abundant on On- 

 tario Peak, the west end in particular, where it not infrequently carpets the 

 ground. Usually growing with Dudleya pumila. Ranging from 4300 to 8500 

 ft. alt. (Nos. 1595, 1807, 1815.) 



PINACE^E 



Pinus Lamberiiana Dougl. Very common in the fir forests of the Upper Transi- 

 tion Zone. Not seen lower than 5500 ft. alt. 



Pinus monophylla Torr. & Frem. A large colony at 6500 ft. alt. in the lower part 

 of the Transition Zone in the upper part of North Fork Lytle Creek. Com- 

 mon at lower altitudes on the desert base of the mountains. (No. 1722.) 



Pinus Murrayana Balfour. The common and characteristic pine of the Canadian 

 Zone. Seen as low as 8000 ft., but usually appearing at about 8500 ft. alt. 

 The only tree on Baldy Summit. (No. 1625.) 



Pinus ponderosa Dougl. The characteristic pine of the Transition Zone; most 

 common in its typical form below 6000 ft. alt. 



