321 
or glumaceous, alternate), 4-parted calyx, corolla with cylindraceous 
tube, 2 stamens with very short filaments, 2-lobed stigma, and ovules 6 
to 10 in each cell. 
1, E. tridentata Vahl, Acaulescent or with proliferous low stems: leaves lanceo- 
late or oblong, 5 to 7.5 cm. long, clustered, as are the hardly longer peduncles or 
scapes, either at the root or at the summit of naked stems: spikes slender: bracts 
ovate, mostly scarious-margined ; the upper commonly tricuspidate or aristate: co- 
rolla purple,—In the mountains west of the Pecos, 
2. EB. bromoides (Ersted. Like the last and often confused with it: leaves in- 
clined to be more oblanceolate and obtuse, and often exceeded by the stouter larger- 
bracted scapes which bear longer and stouter spikes: bracts ovate, not scarious- 
margined or tricuspidate, but simply aristate-acuminate, giving a more wheat-like 
look to the spike.—A Mexican species, collected at Santa Maria (Nealley). 
2. HYGROPHILA BR. Er. 
Swamp plant, with simple stem, flowers sessile in the axils, deeply 
and almost equally 5-cleft or parted calyx, narrowed deeply bilabiate 
corolla with lips erect at base and above spreading, oblong pointless 
anthers with equal and parallel cells, and terete pod 2-celled to the 
very base. 
1. H. lacustris Nees. Nearly glabrous: stem 6 to9 dm. high from a creeping base: 
leaves lanceolate, sessile, entire, about 10 cm, long, scabrous-ciliolate: flowers 
small, white: calyx-lobes and bracts subulate-lanceolate: anthers of the shorter 
stamens smaller.—Swamps. 
3. CALOPHANES Don. 
Low branching pubescent or hirsute perennials, with proportionally 
large axillary nearly sessile blue flowers, deeply 5-cleft or parted calyx 
with elongated setaceous-acuminate or aristiform lobes, funnelform 
corolla with ample limb and convolute in bud, 4 stamens with anthers 
mucronate or aristate at base, ovules a single pair in each cell, and an 
oblong-linear 2 to 4-seeded pod. 
1. C. linearis Gray. Hirsute with somewhat rigid and short hairs, or glabrate, 
not cinereous: stems erect and strict or branched and diffuse: leaves from linear- 
oblanceolate to oblong-spatulate, 18 to 40 mm, long, rather rigid: flowers usually 
foliose-glomerate: corolla purple (?), 20 mm. long; the tube not longer than the 
abruptly ampliate throat: anther-cells aristulate. (Dipteracanthus linearis Torr. & 
Gray in Pl. Lindh. C. oblongifolia, var. Texensis, in Bot. Mex. Bound.)—Dry grounds, 
southern and western Texas. The ‘‘snake-plant” of northern Mexico and Lower 
Rio Grande, and used extensively by the Mexicans as an antidote for snake bites. 
(Havard), 
2. C. decumbens Gray, Cinereous-puberulent throughout, not at all hirsute or 
scabrous: stems mostly spreading on the ground: leaves spatulate, or the lowest 
obovate and the uppermost oblanceolate, with attenuate base, 12 to 28 mm. long: 
flowers few in the foliose-bracteolate clusters: corolla purple, 16 to 20 mm. long; the 
tube double the length of the throat: anther-cells mucronate. (C. oblongifolia Torr. 
Mex. Bound., not Don.)—Dry soil, western borders of Texas. 
4. RUELLIA Plumier. 
Perennials, with rather large and showy blue or purple flowers mostly 
in axillary clusters, 5-parted calyx, funnelform corolla with spreading 
