NORTH AMERICAN SPECIES OF LEPTOCHLOA. 15 



B.— Intermediate between Leptochloa and Diplachne. 



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



Diplachne viscida Scribn. (PI. I. fig. 2; text fig. 9.) 

 Diplachne viscida Scribn. 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 7-flowered. First glume about one-half the 



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



back. 



Fig. 9. — L. viscida. 



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

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

 Brandegee 5; Wright 1086. 



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

 "Novae 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, Humb. et Kunth n. gen. et 

 sp. I. p. 168 (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 

 subfastigiata, 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. 

 Leptostachys dubia Mey. Fl. Esseq. 74. 1818. Refers Chloris dubia doubtfully 



to Leptostachys. 

 Festuca obtusiflora Willd. in Spreng. Syst. 1: 356. 1825. "Mexico." Type 



seen. 

 Uralepis brevispicata Buckley. Proc. Acad. Phil. 1862:93. 1863. "'Northern 



Texas.*' I have examined Buckley's specimen in the herbarium cf the 



Philadelphia Academy. 



