FLORA OF THE SANTA CATALINA MOUNTAINS. 



41 



nately establish and break the connections between the vegetations of 

 the various mountain ranges and elevated plains, thereby permitting the 

 dispersal and subsequent isolation of species which might find no means 

 of movement across the desert valleys under existing conditions. 



LIST OF CHARACTERISTIC SPECIES. 



The lack of a single taxonomic work covering the entire flora of the 

 Santa Catalina Mountains makes it desirable to bring together here a 

 list of the plant names which are used throughout this paper, together 

 with some of the commoner synonyms. The list comprises only those 

 plants which are common and characteristic components of the vege- 

 tation of some particular .region or habitat of the mountain. The writer 

 wishes to express here his very great indebtedness to Professor J. J. 

 Thornber, of the University of Arizona, for determining numerous sets 

 of plants from the Santa Catalinas and for verifying the following list. 



POLYPODIACE*:: 



Aspidium filix-mas (L.) Sw. 



= Dryopteris filix-mas (L.) Schott. 



Asplenium trichomanes L. 



Cheilanthes fendleri Hook. 



Cheilanthes lindheimeri Hook. 



Cheilanthes wrightii Hook. 



Cystopteris fragilis (L.) Bernh. 

 = Filix fraoilis (L.) Underw. 



Gymnopteris hispida (Mett.) Underw. 

 = Gymnogramme hispida Mett. 



Notholcena ferruginea (Desv.) Hook. 



Notholcena hookeri D. C. Eaton. 



Notholcena sinuata (Sw.) Kaulf. 



Pettaea wrightiana Hook. 



Pteris aguilina var. pubescens Underw. 



Woodsia mexicana Fee. 

 EQUISETACE>E : 



Eguisetum robustum A. Br. 

 SKT.AC n.NKi.i.ACE.E : 



Selaginella rupincola Underw. 



Selaginella sp. 

 PINACE^E: 



Abies arizonica Merriam. 



Abies concolor Lindl. & Gord. 



Cupressus arizonica Greene. 



Juniperus pachyphloea Torr. 



Pinus arizonica Engelm. 



Finns cembroides Zucc. 



Pinus chihuahuana Engelm. 



Pinus strobiformis Engelm. 



Pseudotsuga mucronata (Raf.) Sudw. 



= Pseudotsuga taxifolia (Lam.) Britton. 

 GNETACE^E: 



Ephedra trifurca Torr. 

 GRAMINE.E: 



Agrostis scabra var. subrepens Hitchck. 



Andropogon saccharoides Sw. 



= Amphilophis saccharoides (Sw.) Nash. 



Andropogon scoparium Michx. 



Aristida americana var. bromides (H. B. K.) 

 Scribn. & Merr. 



Aristida dicergens Vasey. 



Aristida scheidiana Trin. & Rupr. 



Bouteloua aristidoides (Kunth) Griseb. 



Bouteloua curtipendula (Michx.) Torr. 



GRAM INE^E Continued ' 



Bouteloua hirsuta Lag. 



Bouteloua oKgostachya (Nutt.) Torr. 



Bouteloua polystachya (Benth.) Torr. 



Bouteloua rothrockii Vasey. 



Bromus richardsonii Link. 



Diplachne dubia (Nees) Benth. 



Eragrostis lugens Nees. 



Eragrostis neomexicana Vasey. 



Eragrostis pilosa (L.) Beauv. 



Heteropogon contortvs (L.) Beauv. 



Hilaria cenchroides H. K. B. 



Hilaria mutica (Buckl.) Benth. 



K(jcleria cristata (L.) Pers. 



Leptochloa mucronata (Miehx.) Kunth. 



Muhlenbergia affinis Trin. 



Muhlenbergia dumosa Scribn. 



Muhlenbergia disiichophylla (Presl) Munro. 



Muhlenbergia gracillima Torr. 



Muhlenbergia porteri Scribn. 



Muhlenbergia vaseyana Scribn. 



Muhlenbergia virescens (H. B. K.) Trin. 



Muhlenbergia sp. 



Panicularia nenata (Willd.) Kze. 



Panicum bulbosum H. B. K. 



Panicum bulbosum var. minor Vasey. 



Panicum hallii Vasey. 



Panicum hirticaulum Presl. 



Papphorum wrightii Wats. 



Poa fendleriana (Steud.) Vasey. 



Sitanion elymoides Raf. 



Sporobolus confusus (Fourn.) Vasey. 



Stipa neomexicana (Thurb.) Scribn. 

 CYPERACE^E: 



Carex sp. 



Carex sp. 



Cyperus fendlerianus Boeckl. 



Cyperus inflexus Muhl. 



Cyperus speciosus Vahl. 



Eleocharis montana (H. B. K.) R. & S. 



Fimbristylis sp. 



Hemicarpha micrantha (Vahl) Britt. 



Stenophyttus capillaris (L.) Britt. 

 ('< >M M KI,I x A <]:.]: : 



Commelina dianthifolia DC. 



Tradescantia scopulorum Rose. 



Tradescantia pinetorum Greene. 



