75 



* 



2 . ^r/^^///(r?^///;/i:/^/t7^ Hamilton^ Prod., 5- 



Paspalu?n ptmctaitan^ Fliigg,, Mong., 127. 



Milium punctaiimi J Linn., Am. Acad., v., 392. 

 '-Helopus pilos7is^ Trin., Agrost., 104. 



H, punctatus, Nees. Vasey, in Bot. Wheeler Exped., p. 296. 

 Santa Cruz Valley, near Tucson. 



The same as Nq. 821 of E. Hall's collection of Texan plants, 

 cepting that the awn of the flow^ering glume is much shorter than in 

 Hairs plant. There is the same difference between this and West 

 Indian specimens. No. 824 of E. Hall's collection, ticketed Hclopus 

 mollis^ C. Mtill., is a species of Panicum^ named by Buckley, in herb. 

 Acad., Phila., P. ciliatissimum, 



3. Paniciun sangiiinale^ L., Sp. PL, i., 55. Ne'ar Camp Lowell. 



July. 



4*. Panicum leucophacumy HBK., Nov. Gen., 1,, 97 ; Vasey, Bot. 

 Wheeler Exped., 295. 



P . lachnanthuvi^ Torr., Pac. R. R. Surv., vii., p. 21. 

 Tricholaena insularis^ Griseb., Flor.'Br. W. Ind., 557. 

 Andropogon insulare^ L,, Am, Acad., v., 412. 



Near Camp Lowell. July. 



This is the same as No. 722 of Lindheimer's collection of 1847. 

 Reverchon sends it from Texas^ and Brandegee from Colorado. 

 Specimens from the South-west differ much in appearance from Flor- 

 ida plants referred to this species, collected by A. H. Curtiss and Dn 

 Palmer. The culms are not so stout, the leaves are more numerous, 

 shorter and narrower; the panicle is shorter, with fewer and shorter 

 branches, and the wool of the spikelets is whiter. These differences 

 may be due to differences in soil, climate, degree of moisture, cXc. 

 The species is widely distributed, being found in the tropical and 

 sub-tropical regions of both hemispheres. The Australian speci- 

 mens are said to vary much, especially in the degree- of the develop- 

 ment of the inflorescence (vid. Flor. Austr., vii., p. 472). 



5*. P, capillare^ L., var. .? — Culms caespitose, geniculate and 

 branched below, smooth, a little hirsute at the nodes ; sheaths some- 

 what inflated, sparsely pilose, copiously so along the margins above 

 and at the throat ; leaves lanceolate, 2-3 in. long, 2rS ^^^- "^vide, scab- 

 rous on the margin, with a few long hairs near the base. Panicle vir- 

 gate, the branches single or in pairs, ascending, the lower ones about 



2 in. long. Spikelets \\ line long, on short and unequal pedicels, 



pointed ; lower glumes acute or pointed, \-\ as long as the second ; 

 second glume a little longer than the third, ovate-lanceolate, acute, 

 7-nerved, slightly scabrous at the tip ; third glume in form like the 

 the second, 7-9-nerved, neutral, with a palea |- a line long ; fertile 

 flower smooth and shining, obtuse, less than a line long. 



Santa Cruz Valley, near Tucson. (No. 464.) 



The habit of this grass is well marked, and it may prove a good 

 species. The spikelets are exactly like those of No. 817 of E. Hall's 

 Texan plants,referred to P, proUferum^wl it differs much from that in 

 its low, branched habit, pilose sheaths, short and rather broad leaves 

 characters which point lo P. capiUarc^ L., to which it is doubtfully 

 referred. The habit of the panicle is more like P, proliferum^ while 



