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. 



POLTPODIACE^: 



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 fragilis (L.) Underw. 

 Gymnopteris hispida (Mett.) Underw. 



= Gymnogramme hispida Mett. 

 Notholcvna ferruginea (Desv.) Hook. 

 Notholoena hookeri D. C. Eaton. 

 Notholcena sinuata (Sw.) Kaulf. 

 Pelkca wrightiana Hook. 

 Pteris aquilina var. pubescens Underw. 

 Woodsia mexicana Fee. 

 Equisetace^: 



Equisetum robustum A. Br. 

 Selaginellace^ : 



Selaginella rupincola Underw. 

 Selaginella sp. 



PlNACE^ : 



Abies arizonica Merriam. 



Abies concolor Lindl. & Gord. 



Cupressus arizonica Greene. 



Juniperus pachyphlaea Torr. 



Pinus arizonica Engelm. 



Pinus cembroides Zucc. 



Pinus chihunhuana Engelm. 



Pimis strobiformis Engelm. 



Pseudotsuga mucronata (Raf .) Sudw. 

 = Pseudotsuga taxifolia (Lam.) Britton. 

 Gnetace^: 



Ephedra trifurca Torr. 

 Gkamine.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 divergens Vasey. 



Aristida scheidiana Trin. & Rupr. 



Bouteloua aristidoides (Kunth) Griseb. 



Bouteloua curtipendula (Michx.) Torr. 



Gram ine^ — Continued ■ 



Bouteloua hirsula Lag. 



Bouteloua oligostachya (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. 



Kccleria cristata (L.) Pers. 



Leptochloa mucronata (Michx.) Kunth. 



Muhlenbergia affinis Trin. 



Muhlenbergia dumosa Scribn. 



Muhlenbergia distichophylla (Presi) Munro. 



Muhlenbergia gracillima Torr. 



Muhlenbergia porteri Scribn. 



Muhlenbergia vaseyana Scribn. 



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



Muhlenbergia sp. 



Panicularia nervata (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. 

 Cypekace^: 



Carex sp. 



Car ex sp. 



Cyperus fendlerianus Boeckl. 



Cyperus inflexus Muhl. 



Cyperus speciosus Vahl. 



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



Fi77ibristylis sp. 



Hernicarpha micrantha (Vahl) Britt. 



Stenophyllus capillaris (L.) Britt. 



CoMMELINACEiE : 



Commelina dianthifolia DC. 

 Tradescantia scopulorum Rose. 

 Tradescantia pinetorum Greene. 



