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somewhat velvety: flowers in a globose terminal head: (12 mm. broad), on a short 
peduncle: “corolla golden-yellow turning orange red.”—Southern Texas, along the 
Rio Grande, and adjacent Mexico. 
4. B. scordioides HBK. Ferrugineous-tomentose: leaves narrowly oblong or 
cuneate-linear, nearly sessile, obtuse, coarsely crenate, rugose, 2.5 cm. long or less: 
dense clusters of flowers sessile in the axils of all upper leaves, the pair combined 
around the stem into a globular head,—From southeastern Texas to Arizona and 
adjacent Mexico. Nealley’s specimens from western Texas show the dense axillary 
flower clusters in contact with each other, giving the appearance of a long thick 
spike from which the upper leaves project as bracts. 
6. EMORYA Torr. 
A much branched somewhat pulverulent or puberulent shrub, with 
flowers in a narrow and pedunculate panicle, oblong 4-cleft calyx with 
linear-subulate lobes, salverform corolla, exserted stamens with filiform 
and elongated filaments inserted on the middle of the tube, very long 
and filiform style, and a septicidal globose or oblong pod. 
1. EB. suaveolens Torr. Leaves canescent beneath, somewhat deltoid or hastate, 
sinuate-dentate with a few coarse teeth, obtuse, petioled, 12 mm. or more long: flow- 
ers sweet-scented: corolla over 2.5 cin. long, ‘‘greenish-white or yellowish,”—Canons 
of the Rio Grande below Presidio. 
GENTIANEZ. (GENTIAN FAMILY.) 
Smooth herbs, with opposite and sessile entire and simple leaves (in 
ours) without stipules, regular flowers with stamens as many as the 
corolla-lobes, a 1-celled ovary with 2 parietal placentw or nearly the 
whole inner face ovuliferous, and fruit usually a 2-valved septicidal 
many-seeded pod. 
* Leaves sessile, never alternate. 
+ Lobes of corolla convolute in bud. 
++ Style filiform, usually deciduous: anthers mostly twisting or curving in age. 
1. Brythrza. Parts of flower 5 or 4: corolla salverform: anthers twisting spi- 
rally. 
2, Sabbatia. Parts of flower 5 to12: corolla rotate: anthers recurved or revolute, 
8. Bustoma. Parts of flower 5 or 6: corolla campanulate-funnelform: anthers 
versatile, straight or recurving: calyx-lobes long-acuminate, 
++ ++ Style stout and persistent: anthers remaining straight. 
4. Frasera. Corolla 4-parted, rotate; a fringed glandular spot on each lobe. 
+ + Lobes of corolla imbricate in bud; no appendages. 
5. Obolaria. Calyx of 2 foliaceous sepals: corolla 4-lobed, oblong-campanulate. 
* * Leaves all alternate and mostly petioled: marsh or aquatic perennials. 
6. Limnanthemum. Leaves simple, rounded: corolla bearded at base or margins 
only. 
1. BRYTHR2A Richard. (CENTAURY.) 
Low and small branching annuals, chiefly with rose-purple or reddish 
flowers, 4 or 5-parted calyx with slender divisions, funnelform or salver- 
form corolla with slender tube and 4 or 5-parted limb, exserted erect 
