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1. R. ramosior Koehne. Leaves tapering at base or into a short petiole, linear- 
oblanceolate or somewhat spatulate: flowers solitary (rarely 3) in the axils and 
sessile: accessory teeth of calyx as long as the lobes or shorter. (Ammannia humilia 
Michx.)—A species of the Eastern States and extending into Texas to San Saba 
County. 
2. AMMANNIA Houston. 
Low and inconspicuous smooth herbs, with opposite narrow leaves, 
small axillary flowers (sessile or nearly so), 4-angled and 4-toothed cal yx 
usually with a little horn-shaped appendage at each sinus, 4 purplish 
petals (or sometimes wanting), 4 or 8 stamens, and a globular 2 to 4-celled 
capsule which bursts irregularly. 
1. A. coccinea Rottb. Leaves linear-lanceolate, 5 to 7.5 cm. long, with a broad 
auricled sessile base: cymes subsessile, dense: petals purplish: stamens 4 or 8, more 
or less exserted: style usually slender: capsule included. (A. latifolia of American 
authors, not L.)—Reported from the upper Guadalupe and San Antonio, but doubt- 
less throughout eastern and southern Texas. 
2, A. auriculata Willd. Resembling the last, but distinguished by its decidedly 
vedunculate flowers and rather loose cymes, 4 (rarely 3) stamens, and half-exserted 
capsule. (4. Wrightii Gray)—Along the tributaries of the upper Rio Grande, espe- 
cially above the Pecos. 
3. NESZA Comm. 
Slender herbs or shrubs, with opposite leaves, solitary axillary flowers 
on very long peduncles, generally 6 petals, 12 or 13 stamens, and septi- 
cidal or septifragal capsule. 
1. N. longipes Gray. Aslender much branching glabrous herb, diffuse or ascend- 
ing, 3to9dm. long: leaves linear, subsessile, auriculate at base, with revolute Inargins, 
2.5 to 5 cm. long, 2 to 4 mm. wide: peduncles filiform, elongated, about as long as the 
leaves, bibracteolate near the purple flower: capsule opening by a little lid and then 
splitting septifragally.—Wet places along the Rio Grande. 
2. N. salicifolia HBK. A glabrousshrub: leaves lanceolate, tapering into a short 
petiole, sometimes whorled : peduncles short : calyx-lobes connivent-closed above the 
septicidal capsule. (Heimia salicifolia Link)—Along the Lower Rio Grande. 
4. LYTHRUM L. (Loossstrire). 
Slender herbs, with opposite or scattered mostly sessile leaves, pur- 
ple flowers in 3 to many-flowered axillary cymes, a tubular striated 
calyx appendaged in the sinuses, 5 to 7 petals, as many or twice as 
many stamens, and an oblong 2-celled capsule. 
1. L. alatum Parsh. Tall and wand-like perennial, the branches with margined 
angles: leaves oblong-ovate to linear-lanceolate, acute, with a cordate or rounded 
base, the upper mostly alternate: calyx 4 to 8 mm. long: petals rather large, deep 
purple: stamens ot the short-styled flowers exserted : fleshy hypogynons ring prom- 
inent.—In low ground throughout southern and western Texas. The following 
species have a similar range, are very closely related, and have usually been regarded 
as but varieties of L, alatum, but have been recently set apart by Koehne as species. 
2, L.lanceolatum Ell. Leavesoblong-linear or lanceolate, with an acute or cuneate 
base: the fleshy hypogynous ring as prominent asin the last (as high as broad). (1. 
breviflorum Wats. ) 
3. L. ovalifolium Engelm. Leaves suborbicular or oblong: the fleshy hypogynous 
ring small. (4, alatum, vars. ovalifolium and pumilum Gray.) 
