320 



Bulletin No. 205 



[March, 



sheaths a little more than half the length of the internodcs, eiliate on 

 the margin, otherwise smooth, rarely with fine pubescence; ligule 

 about 1 mm. long; blades 2.5 to 5 inches long, 1.5 to 3 cm. wide, 

 usually smooth on both surfaces but sometimes with a few fine, short 

 hairs on the upper surface, eiliate on the margin at base; spikelets 

 4 to 4.5 nun. long, covered with fine hairs. Autumnal form as in 

 r. clandestinum, sometimes branched enough to be top-heavy. 



This species is found in woods and other shady places. It is closely 

 related to P. latifolium and has been mistaken for that species by many 

 of the earlier writers, who seem to have included all the species of 

 Ijatifolia under that name. 



CHRISTIAN CO. TaylorviUe, Andretvs, May, 1899. .jackson co. Without lo- 

 cality, French in 1905. johnson CO. Tunnel Hill, Eidgway in 1902. pope co. 

 Herod, Clinton, July, 1898. ST. clair co. Mascoutah, Welsch. wab.vsh co. 

 Without locality, Schncclc, May, 1906; without locality. Shearer, Aug., 1899; 

 Hanging Kock, 'Schncclc, Sept., 1904; Key's Hill, Schneck, June, 1905. 



92 [/ 93 94 



Figs. 92-94. — Spikelets: 92, P. cJandcsiinum ; %\, P. hoscii ; 94, P. hitifoUum 



Panicum boscii molle (Vasey) Hitchc. and Chase 



This diffei's from the species in the soft pubescence of culms and 

 sheaths, which gives them a velvety appearance. The blades are vel- 

 vety on the under surface and have slightly longer hairs on the upper 

 surface. It is usually not so tall as the species, but there are inter- 

 grading forms. 



UNION CO. Without locality, French in 1872. wabash co. Without locality. 

 Shearer, Aug., 1899; Lcipold's farm, Schneck, May, 190(5; Mt. Carmel, Schneck, 

 May, 1904. 



Panicum clandestinum Tj. 



(Fig. 92) 



Engelmann '44, 10.3; Lapham '57, 548, 595; Patterson '7G, 52; Flagg '78, 

 284; Brendel '87, 64; Higley and Eaddin '91, 139; Huett '97, 128; Hitchcock 

 and Chaso '10, 312. 



Vernal form with the culms in large clumps, the culms 2.5 to 5 

 feet tall, usually papillose-pubescent ; sheaths as long as the internodes, 

 with long hairs like the culm, at least on the lower sheaths, or on the 



