NOKTH AMERICAN SPECIES OF LEPTOCHLOA. 15 



B.— Intermediate between Leptochloa and Diplachne. 



LEPTOCHLOA VISCIDA Beal. Grasses N. A. 2: 434. 1896. Transfers 



Diplachne riscida Scribn. (PI. I. fig. 2: text fig. 9.) 

 Diphichne viscida Seribn. Bull. Torr. Bot. Club, 10: 30. 1883. •• Santa Cruz 



Valley, near Tucson, Arizona." Collected by Pringle. 

 Growing in tufts in moist places. 1 to 3 dm. high. Leaves a few cm. long. 2 to 3 



mm. wide. Panicle short. 1 to 4 cm. long, more or less enclosed in the sheaths. 



Spikelets 3 to 4 mm. long. 5 to T-flowered. First glume about one-half the 



second, i mm. long. Flowering glumes short awned, somewhat viscid on the 



back. 



Ftg. 9.—L. viscida. 



Distribution: Arizona: Pringle: Mearns 793, 833; Griffiths 1988. New Mexico: 

 Wright 2041. 2044. Mexico: Pringle 814: Palmer 748. 748+, 692, 1789; 

 Brandegee 5; Wright 1086. 



LEPTOCHLOA DTJBIA Nees in Syll. Ratisb. 1 : 4. 1824. In an article entitled 

 •• Nova? plantarum species in horto botanico Bonnensi culta?,* ? Nees ab Esen- 

 beck. who signs the portion relating to Leptochloa, describes L. procera, and 

 states that it differs from "Leptochloa gracile, Hmnb. et Kunth n. gen. et 

 sp. I. p. 108 ( sub chlori) . vaginis glabris, valvulis corollinis nudis, nee ciliatis, 

 apice integris. mucronatis, nee aristatis, flosculorum numero minore . . . 



A Leptochloa (Chlori) dubia Humb. et Kunth 1. c. p. 169; panicula aequali, nee 

 subf a stigiata, flosculorum numero minore. valvulis nudis. nee ciliatis . . ." 

 He thus incidentally transfers these two species of Chloris to Leptochloa. 

 (Fig. 10.) 



Fig. 10.— L. dubia. 



Chloris dubia H. B. K. Nov. Gen. 1 : 169. 1815. " Crescit in apricis subhumidis 



prope rupem porphyriticam el Penon. in convalle Mexicana, alt. 1168 



hexap." 

 Lepto.stach/j.s dubia Mey. Fl. Esseti. 74. 1818. Refers Chloris dubia doubtfully 



to Leptostachys. 

 Festuca obi u si flora Willd. in Spreng. Syst. 1: 356. 1825. "Mexico."' Type 



seen. 

 Uralepis brevispicata Buckley. Proe. Acad. Phil. 1S(>2:93. 1863. •"Northern 



Texas.'" I have examined Buckley's specimen in the herbarium of the 



Philadelphia Academy. 



