237 
very narrow, the smaller attenuate into a short single awn, the larger into a longer 
capillary awn with a delicate short one at each side,—Prairies of southwestern Texas. 
4, H. Wrightii Gray. Erect or diffuse, with branches bearing few or solitary 
heads on peduncles 2.5 to 7.5 em. long: leaves narrowly linear to filiform, setulose- 
mucronate, many entire, some with 1 to 3 small subulate lobes: involucre 16 to 20- 
toothed: scales of pappus 10, all slenderly 3-awned, the lateral ones half the length 
of middle one.—Prairies of southern Texas, 
5. H. tenuilobum DC. Diffusely branched and spreading: heads on filiform 
peduncles 2.5 to 10 em. long: leavesall pinnately parted into 7 to 11 subulate-filiform 
setulose-mucronate divisions: involucre about 12-toothed: scales of pappus 10, all 
nearly similar and bearing 2 lateral and a middle longer stouter awn. ( H. tenuifo- 
lium Gray, Pl. Wright,)—Southeastern Texas, along or near the Rio Grande, 
+ + All 10 pappus scales nearly similar and tapering into a single short awn, the larger 
mostly 2-setulose. 
6. H. Thurberi Gray. Suffruticulose, low and diffuse, cinereous-puberulent or 
glabrate: leaves rigid and acerose: pappus scales all narrowly lanceolate, alternate 
shorter ones subulate-awn-pointed, the others with awn and pair of obscure or man- 
ifest teeth at base.—In extreme southwestern Texas about E] Paso. 
+++ Scales of pappus 10 and of 2 forms, the 5 outer obtuse and pointless, the inner 
bearing a single awn between a pair of cusps or teeth. 
++ Low and diffuse suffruticulose perennials, cinercous-pubescent or glabrate: leaves rigid, 
pinnately parted into filiform or acerose entire mucronate or subulate-tipped divisions: 
heads on elongated filiform peduncles, 
7. H. Hartwegi Gray. Nearly herbaceous and glabrous: leaves chiefly opposite, 
of few rather long filiform-acerose divisions: heads numerous, 4 mm. high: outer 
pappus scales subcoriaceous, with truncate obscurely denticelate summit.—South- 
western Texas. 
8. H. pentachetum DC. Decidedly suffruticulose, cinereous-puberulent to gla- 
brate (sometimes the foliage canescent): upper leaves alternate, the divisions slen- 
der subulate-acerose: involucre 4 to 6 mm. high: outer pappus scales thinnish, 
usually erose at summit.—Dry hills of southern and western Texas. 
9. H. Treculii Gray. Diffuse, nearly herbaceous, almost glabrous, with loose 
elongated leafy branches and very scattered heads: leaves pectinately parted into 
linear-subulate equal short divisions, which are rather narrower than the rhachis: 
involucre 6 mm. high: pappus of the preceding.—Southeastern Texas. 
++ ++ Low and densely floccose-lanate and soft-leaved annual. 
10. H. Gnaphaliopsis Gray. Depressed or diffusely spreading, clothed even to 
the involucre with dense white wool, leafy up to the sessile or short-peduncled soli- 
tary heads: leaves alternate, spatulate, entire: involucre 6mm. high: scales of inner 
pappus narrowly lanceolate.—Hills and plains of southern Texas. Called “lep- 
iana” by the Mexicans, and used by them and the Indians as a remedy for catarrh 
(Havard). 
** * * Panpus scales 5 to 12, truncate and pointless, somewhat coriaceous, distinc? or cup- 
ulately connate. 
11. H. Greggii Gray. Fruticulose and in dense tufts: branches thickly leafy up 
to the filiform glabrate peduncles: leaves white-tomentose, short, heath-like; lower 
3 to 7-parted, upper entire and setaceous: rays short, sometimes wanting: pappus 
scales united into an entire truncate cup. (Lhymophylla Greggit Gray, Pl. Fendl. 
& Pl. Wright.)—Southwestern Texas, on the Pecos, etc. 
12. H. aureum Gray. Wholly glabrous much branched annual, erect or diffuse, 
bearing numerous short-peduncled heads: leaves pinnately parted into 7 to 9 linear- 
filiform pointless divisions: rays 6 mm.long: pappus of 6 or 8 quadrate or oblong 
and erose-truncate scales. (Lewellia aurea Gray, Pl. Fendl. & Pl. Wright.)—Plains 
of western Texas. 
