76 



the prominently 3-5-nerved, pointed, lower glume and the palea to 

 the third glume are characters not found in Eastern specimens of 

 either P, capillare or P. proliferum^ but point to P. virgatum^ L. 

 The third glume of the latter, however, is staminate and the fertile 

 flower is more turgid, 



6*. Panicu?n fusaim^ Swartz. — Santa Cruz Valley, near Tucson, 

 June. 



Apparently the same as No. 825 of E. Hall's Texan plants, but more 

 slender, with leaves and sheaths smoother. It is probably the P, 

 reticulatum^ Torr. (Marcy's Rept.)* 



7. Panicum ( Virgarid) sp., allied to P. fusaim^ Sw. — Culms pros- 

 trate below, rooting at the lower joints, smooth, as are the numerous 

 ascending branches, except just below the panicle ; sheaths striate, 

 smooth, slightly inflated, shorter than the internodes ; leaves linear,cor- 

 date and clasping at the base {i|— 5 in. long, 3 lines wide), scabrous 

 on the cartilaginous margin, which is also pilose near the base. Pan- 

 icle at length exserted, 3-6 in. long, the axis and the ascending or 

 erect simple branches finely pubescent, and also sparsely pilose with 

 rather stiff, spreading hairs; the lower branches about 2 in. long, 

 bearing the approximate but not crowded, racemose spikelets in pairs 

 (the upper ones single), one nearly sessile and often imperfectly de- 

 veloped, the other on a pedicel nearly its own length ; pedicels pi- 

 lose and finely pubescent. Spikelets oblong or obovate, somewhat 

 pointed {i\ line long), the three outer glumes pubescent ; lower 

 glume deltoid, obtuse, 5-nerved, i as long as the spikelet ; second and 

 third glumes sub-equal, as long as the fertile flower, the second 7- 

 nerved, the thirds-nerved, with a palea; nerves with connecting 

 reticulations above. Fertile flower nearly i^^ line long, pointed and 

 transversely rugose, slightly compressed on the back. 



Santa Cruz Valley, near Tucson. (465.) 



I have not seen this before in North American collections, but it 

 probably belongs to some of the described species allied to P. gros- 

 sarium^ L., or P. fuscmn^ Sw. The spikelets resemble those figured 

 in Trinius's Icon. Gram., for P. velutinosum, Nees. 



8. Panicum obtusum^ HBK., Nov. Geni, i., 98; Vasey, in Bot. 

 Wheeler Exped., p. 294. Santa Cruz Valley, near Tucson. May. 



The same as 960 of C. Wright, and 827 of E. Hall's Texan collection. 

 T. S. Brandegee collected the same in Arkansas Canon and near 

 Canon City. (vid. herb. J. H. Redfield.) 



^ 9. Panicum maxinmm,]d.Q(i.,\zx,bulbos2an.~'Roc\y canons, Santa 

 Rita Mts,, Arizona. 



This appears to be a good species, and is referred as above with 

 some doubt. It is like No. 958 of Parrv & Palmer's collection in 

 Central Mexico, 1878. 



10. Panicum scopanum, Lam., Encycl., iv.; Thurber, Bot. Cal., ii., 

 p. 259 ; P.paucifiorum, Ell. 1 ; Gray's Manual, p. 648. By streams of 

 the Sta. Catalina Mountains. 



* Since the note on this species was written. I have seen specimens of No. 

 2.091 of C Wrighfs N. Mex. collection (1851-52) and find it to be the same, Dn 

 lorrey, m Marcy s Report, says that No. 2,090 and No. 2,091 of Wright's collection 

 are glabrous and more robust forms of his P, reiiculatum. 



