468 BOTANY. 



31. G. ScHOTTii, S. Watson. (^Kavarretia, Torr.) Leaves linear, scarcely dilated above, coroUa 5" long, 

 tube not exserted; anthers subrounded, smaller; capsule ovate, cells 4-6-seeded, (3-5 ovuled, Grai/.) — 

 Referred to the last by Dr. Gray as Var. exigua. See page 267. 



§ 7. HYGELIA, Gray. Flowers capitate-clustered, tlie base of the numerous 3-5-cl6ft leafy bracts 

 and the calyx densely clothed with white wool, the lobes acerose or subulate, cuspidate ; corolla 

 salverform, bine or whitish, tube slender, lobes usually oblong ; anthers exserted, mostly linear^ 

 sagittate; ovules very variable. — Herbage more or less floccose-woolly, not viscid nor glandular ; 

 leaves simply pinnately parted or some of them entire, acerose or subulate-filiform. 

 * Eoot perennial ; stem rigid ; anthers linear-sagittate. 



32. G. DBNSIFOLIA, Benth. Stems 6-12' high, simple or sparingly branched, leafy to the top, with' 

 1-^few heads ; leaves rigid, mostly short-lobed ; coroUa-tube i' long, 3-3 times exceeding the calyx. — 

 S. California. 



* * Annual, the stems at length paniculate-branched, slender ; leaves or their mostly few segments 

 filiform. 



33. G. viEGATA, Steud. Commonly strict and at first. simple, 6-12' high; lower leaves mostly entire ; 

 corolla-tube at length usually exsert, the lobes 3" long; anthers linear-sagittate, 1" long; cells 2-3- 

 ovuled. — California. 



34. G. FLOCCOSA, Gray. More slender, becoming diffusely pauicled; heads and flowers smaller; 

 anthers linear-oblong, hardly over -J" long ; cells usually 1-2-ovuled. See page 267. 



35. G. FIHFOLIA, Nutt. Slender, rather rigid ; leaves mostly 3-parted ; flowers still smaller, the lobes 

 1-2" long and tube scarcely exsert ; anthers oval, i— J-" long ; cells usually 4-6-ovuled. See page 267. 



5 8. ELAPHOCEEA, Nutt. Flowers in crowded bracteate heads, or rarely rather loose and cym- 

 ose ; corolla white or purplish, salverform, the tube seldom much exceeding the cuspidate or 

 awned, not pungent calyx-lobes ; stamens inserted in or near the sinuses, shorter than the oval or 

 oblong corolla-lobes. Low or dwarf annuals, biennials or short-lived perennials, more or less woolly- 

 pubescent; calyx and bracts mostly pubescent or ciliate with long rather viscid jointed hairs. 

 * Leaves entire, aoerose-subulate or filiform ; flowers crowded ; filaments slender, exserted. 



36. G. WiiiGHTii, Gray. Stems 1° high, rigid, vifgate, woody ■ at base, leafy throughout ; leaves 

 rigid, cuspidate-mucronate ; bracts broad-lanceolate, the. larger ones sublaciniate, awned-cuspidate as 

 are the subulate calyx-lobes, ciliate ; corolla-tube 4" long, twice exceeding the oblong lobes ; cells 3-4- 

 OTuled. — W. Texas. 



37. G. GuNiNisoNi, T. & G. Annual, slender, loosely paniculate ; leaves scattered, linear-filiform. ; 

 calyx-lobes and entire bracts short and short-cuspidate ; flowers in small heads terminating slender 

 branohlets. See page 268. 



* * Leaves mostly pinnately parted, sometimes all entire ; segments few, narrow-linear : filaments 

 shorter than the corolla-lobes ; coroUa-tnbe scarcely at length exceeding the calyx : flowers closely 

 capitate-clustered. Biennial or perennial, the simple or clustered stems hardened at base. 



38. 6. SPICATA, Nutt. Rather stout, erect, 4-10' high ; flower-clusters crowded into an interrupted 

 leafy virgate spike, or in a single thick head, (Var. capit.v.ta ;) leaves sub-3-cleft or often all entire, 

 and with the calyx-lobes barely if at all mucronate; corolla-lobes shorter than the scarcely exserted 

 tube; anthers subsessile ; cells 4-6-ovuled. — (Mlorado. 



39. G. coxGESTA, Hook. Stems erect, diffuse, or depressed, with single or few and corymbose close 

 heads ; leaves with 3-7 mucronate lobes or entire ; calyx-lobes usually short-awned, equaling the corolla- 

 tube ; filaments equaling or exceeding the anthers ; cells 2-4-ovuled. See page 268. 



40. G. iBEiiiDiFOLiA, Benth. Leaves more rigid, oalyx-lobos and bracts more strongly cuspidate ; 

 heads looser, corymbose ; filaments shorter ; ovules solitary.— Nebraska and Wyoming. 



* * * Leaves pinnatifld, trifid or aubentire ; flowers leafy-braoted, cyfflulose-glomerate or at length 

 loose; calyx and bracts awned-cuspidate. Low branching annuals. 



41. G. PiiMrLA, Nutt. Stem somewhat loose- woolly, leafy; divisions of the leaves narrow-linear; 

 corolla-tube twice exceeding the calyx; filaments slender ; cells about 6-ovulod. See page 268. 



42. G. POLYCLADOjy, Torr. Stems puberulent or subpubesccnt, few-leaved ; leaf-segments short, 

 oblong ; corolla-tube hardly exceeding the calyx ; filaments very short ; cells 2-ovuled. See page 268. 



§ 9.IPOMOPSIS, Benth. Thyrsoid-panicled, the bracts small or none; corolla (scarlet or orange) 

 tubular-funnelforni, the tube greatly exceeding the subulate calyx-lobes and the spreading ovate or 

 lanceolate lobes of the limb ; stamens inserted in the throat or below the sinuses, shorterthan the 

 corolla ; ovules numerous. Biennials, smoothish or a little hairy ; leaves simply pinnatifid. 

 * Tall, leafy-stemmed ; leaves pinnately parted, the segments filiform or narrow-linear. 



43. G. COROXOPIFOLIA, Pers. Glabrous or nearly so, 2-6° high, very leafy ; leaflets and rachis nearly 



