Great Basin: Arizona New Mexico District. 579 
Jascieulatum and in the shadiest nooks the tall Pedicularis Gray: with fern-like 
foliage. A somewhat similar condition is found on the Huachuca, Santa 
Rita and Santa Catalina Mountains: Pinus arizonica, P. cembroides, P. chihu- 
ahuana occur on the Rincon Mountains while ?. ponderosa is extremely rare 
apparently having reaches its southern limit. The flora of these ranges is clearly 
of a Mexican character ‘). 
Robinia neo-mexicana occurs in the Organ Mountains of New Mexico with Rosa Fend- 
leri, Berberis trifoliolata, Dalea (Parosela) Sohn Linum rigidum, Erigeron flagellaris, Dryopetalon 
runcinatum, Aster ericaefolius, Lesquerella purpurea, Solanum tuberosum, Oxalis vespertilionis, 
Clematis ligustrina, Heuchera rubescens, Perezia nana, Gaura parviflora (almost) Bir G. 
coccinea, Gossypianthus rigidiflorus, Portulaca lanceolata, and the f ollowing fern 
Gymnopteris (Neurogramme) hispida Mett. com- (G teris) Ehrenb Kl. 
monly forming mats over the warmer rocks Pellaea- atropurpurea L. under the Ay of 
with Selaginella rupinicola Underw.; rounded granite boulders in dry warm 
Notholaena sinuata Lag. On RER and situations; 
siliceous rocks in dry warm situations; Pellaea ternifolia Cav. S 
Notholaena sinuata var. integerrima Hook.; Pellaea Wrightiana Hook., ommon in loose 
Notholaena ferruginea Desv. (=N. bonafieists 1 soil under the a of round granite 
Willd.); boulders, growing best during the early 
Notholaena Hookeri D. C. Eaton, the common- spring months; 
est fern of the range; Pellaea intermedia Mett.; 
Eiotliolsens dealbata Pursh, on steep limestone Fun resiliens Kıale, only in a few places 
cliffs; ry soil under overhanging rocks; 
inte: Feei Moore, in crevices of vertical Kunliäitei trichomanes L.,under the rocks in wet, 
rhanging rocks; cool, shady places near running water; 
heiraten tomentosa Link, in bunches at base Dryopteris filix mas L. in a cool moist canyon; 
of loose rocks in dry silicious soil and Phanerophlebia auriculata Underw., in cool, 
but partly protected from the sun; shady, moist situations in a single canyon; 
Cheilanthes ee var. Eatoni Baker; ee a, Bus L. growing in open 
Cheilanthes Fendleri Hook.; wet so 
Cheilanthes SE Hose orming long Weide mexicana F ee rare on the higher 
matted strings of vegetation in the crevices slopes of the Organ Mountains. 
of the _ granite boulders which fill 
the can | 
Pinon Pine Formation. Ascending the San Francisco range of mountains 
and also the Mogollon Mountains the first distinctive mountain belt is that of 
the pihon pine Pinus edulis (5,700—7,000 feet). P. edulis is associated with 
Juniperus monosperma and F. pachyphloea, Quercus agrifolia, Q. Emoryi, and 
such shrubs as Berberis Fremontii, Rhus aromatica var. trilobata, Holodiscus 
discolor with Fucca baccata, Opuntia arborescens, Ephedra antisyphilitica, Ment- 
zelia albicaulis, Pectis angustifolia and along creeks Platanus occidentalis, 
Populus monilifera, Schrankia uncinata. Near the Grand Canyon of the Colo- 
rado and again at Walnut es where the lava rock gives place to lime- 
5 ToumeEy, J. W.: Pines Forests of southern and central Arizona 1897. 
) PLAnK, E. N.: Botanical Journey Sn New Mexico. Wooron, E. O.: The Ferns of 
the Oi Mountains. 1903. 
ie 
