168 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



(Stenophyllus capillaris Britton), but probably represent a reduced 

 state of B.juncoides. As was pointed out by H.K. Svenson (personal 

 communication), B. juncoides, in addition to the perennial habit, 

 differs from B. capillaris in having larger achenes, these becoming 

 slate-colored at maturity, whereas in B. capillaris, as represented in 

 the eastern United States, the mature achenes are straw-colored or 

 pale brown. It is doubtful that B. capillaris occurs in Arizona. 



2. Bulbostylis funckii (Steud.) C. B. Clarke in Urban, Symb. Ant. 5: 

 290. 1907. 



Isolepis junckii Steud., Syn. PL Glum. 2: 91. 1855. 

 Stenophyllus funckii Britton, Torrey Bot. Club Bui. 21: 30. 

 1894. 



Hualpai Mountain, Mohave County (Kearney and Peebles 12721), 

 Pinal Mountains, Gila County (Peebles et al. 3231), Chiricahua 

 Mountains, Cochise County (Blumer 1646), 5,000 to 7,500 feet. New 

 Mexico and Arizona, southward to South America; West Indies. 



7. CLADIUM. Sawgrass 



Plants perennial, tall; stems leafy; spikelets terete, fusiform, in 

 small clusters forming an ample cymose panicle; scales imbricate, only 

 the uppermost ones usually subtending perfect flowers, the lowest 

 scales empty; anthers elongate, aristate-acuminate ; achenes obovoid, 

 without an apical tubercle. 



1. Cladium mariscus (L.) R. Br., Prodr. Fl. Nov. HoU. 1: 236. 1810. 



Schoenus mariscus L., Sp. PI. 42. 1753. 



Grand Canyon, Coconino County, about 2,000 feet. Arizona and 

 California, south to Central America. 



The Arizona form is var. californicum Wats. (Mariscus californicus 

 Fernald), which is probably specifically distinct from C. mariscus. 



8. CAREX. 17 Sedge 

 Contributed by J. W. Stacey. 



Plants grasslike, perennial, monoecious or sometimes dioecious; 

 culms mostly triangular; leaves three-ranked, the upper ones (bracts) 

 elongate, or short, or wanting ; spikes one to many, sessile or peduncled, 

 either wholly pistillate, wholly stamina te, androgynous (staminate 

 above), or gynaecandrous (staminate below); flowers solitary in the 

 axils of the glumes; perianth none; stamens 3 (rarely 2) ; pistil single, 

 the style 1 , the stigmas 2 or 3 ; achene triangular, lenticular, or plano- 

 convex, completely surrounded by the perigynium. 



The members of this genus that occur in the State of Arizona are 

 generally found in the mountains, seldom growing below 5,000 feet, 

 except in shady canyons. The southwestern part of the State, com- 

 prising southern Mohave, southwestern Yavapai, western Maricopa, 

 and western Pima Counties, together with the whole of Yuma County, 

 does not contain a single Car ex, as far as is known. Of the 40 species 



17 The artificial key to the Arizona species has heen somewhat adapted from that of K. K. Mackenzie 

 (Carex. North Amer. Flora 18: 9-471. 1931, 1935), to whom credit should be given for the most modern treat- 

 ment of this genus. 



