468 
BOTANY. 
31. G. ScKOTTii, S. Wutsou. {Xavarretia, Torr.) Lt-avot, liuear, scarcely diluted above, corolla 5" long, 
tube not exserted ; anthers snbrounded, smaller: capsule ovate, cells 4-r)-seeded, (o-5 ovnled, <??•«//.)— 
Referred to the last by Dr. Gray as Vdv. kxigua. See page 267. 
§ 7. HYGELIA, Gray. Flowers capitate-clustered, tlie base of the numerous 3-5-cleft leafy bracts 
and the calyx densely clothed with white wool, the lobes acerose or subulate, cuspidate ; corolla 
salverform, blue or whitish, tube slender, lobes usually oblong ; authors exserted, mostly linear- 
sagittate; ovules very variable. — Herbage more or less floccose-woolly, not viscid nor glandular ; 
leaves simply pinuately parted or some of them entire, acerose or subulate-filiform, 
* Hoot perennial ; stem rigid ; anthers liuear-sagittate. 
32. G. DKXSiFor-iA, Benth. Stems G-12' high, simple or sparingly branched, leafy to the top, with 
1-few heads ; leaves rigid, mostly short-lobed ; corolla-tube ^ long, 2-3 times exceeding the calyx.— 
S. California. 
* * Annual, the steins at length pauiculate-brauched, slender ; leaves or their mostly few segments 
filiform. 
33. G. virOtATA, Steud. Comnionly strict and at first simple, 6-12' high ; lower leaves mostly entire ; 
corolla-tube at length usually exsert, the lobes 3" hmg ; anthers linear-sagittate, l"loag; cells 2-3- 
ovuled, — California. 
34. G. n.occosA, Gray. More slender, becoming dilfasely pauicled; heads and flowers smaller; 
antluas lin<'ar-oblong, hardly over i" long ; cells usually 1-2-ovuled. See page 267. 
35. G. i-riJFOLiA, Xntt. Slender, rather rigid : leaves mostly 3-parted ; flowers still smaller, -the lobes 
1-2" long and tube scarcely exsert ; anthers oval, long; cells usually 4-6-ovuled, See page 267. 
$ 8. ELAPHOCERA, ^'ntt. Fh)wers in crowded bracteato heads, or rarely rather loose and cyui- 
ose ; corolla white or puri)lish, salverform, the tube seldom much exceeding the cuspidate or 
awued, 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- 
pnbescent ; calyx and bracts mostly pubescent or ciliate with long rather viscid jointed hairs. 
* Leaves entire, acerose-subulate or filiform ; flowers crowded ; filaments slender, exserted. 
36. G. AViUGiiTii, Gray. Stems P high, rigid, virgate, woody at base, leafy throughout; leaves 
rigid, cuspidate-mucronate ; biacts 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- 
ovuled. — W. Texas. 
37. G. GuNNisoNi, T. & G. Annual, slender, loosely paniculate ; leaves scattered, liuear-filiform ; 
calyx-lobes and entire bracts short and short-cuspidate ; flowers in small heads terminating slender 
branchlets. See page 268. 
* * Leaves mostly pinuately parted, sometimes all entire ; segments few, narrow-linear : filaments 
shorter than the corolla-lobes ; corolla-tube scarcely at length exceeding the calyx : flowers closely 
capitate-clustered. Biennial or perennial, the simple or clustered stems hardened at base. 
38. G. spiCATA, Niitt. Rather stout, erect, 4-10' high ; flower-clusters crowded into an interrupted 
leafy virgate spike, or in a single thick head, (Var. cai'itata ;) 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-C-ovuled. — Colorado. 
39. G. CONCiESTA, Hook. Stems erect, diffuse, or depressed, with single or lew and corymbose close 
heads ; leaves with 3-7 inucronate lobes or entire ; calyx-lobes usually short-awued, equaling the corolla- 
tube ; filaments equaling or exceeding the anthers ; cells 2-4-ovnled. See page 268. 
40. G. IBERIDIFOLIA, BenHi. Leaves more rigid, calyx-lobes and bracts more strongly cuspidate ; 
heads looser, corymbose ; filameuts shorter ; ovules solitary. — Ni'braska and Wyoming. 
* * * Leaves pinnatifid, trifid or subeutire ; flowers leafy -bracted, cyniulose-glomerate or at length 
loose; calyx and bracts awned-cuspidate. Low branching annuals. 
41. G. PtJsriLA, Nutt. Stem somewhat loose woolly, leafy; divisions of the leaves narrow-linear; 
corolla-tube twice exceeding the calyx ; filaments slender ; cells about 6-ovuled. See page 268. 
42. G. POLYCLADO.N , Torr. Stems puberuleut or subpubesceut, 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) 
tnbular-funuelform, the tube greatly exceeding the subulate calyx-lobes and the spreading ovate or 
lanceolate lobes of the liinb ; stamens inserted in the throat or below the sinuses, shorter than 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^ liigh, very leafy ; leaflets and rachis nearly 
