924 GENTIANACEAE 
not prominently nerved : calyx narrowly campanulate, 2.5-3 mm. long’; lobes ovate-lanceo- 
late, obtuse, denticulate : corolla at length much longer than the calyx, whitish, 3-5 mm. 
long, marked with dark stripes ; tube somewhat constricted at the throat, about as long as 
the linear-lanceolate erect or converging, rather obtuse lobes: capsule sessile or nearly so, 
4 mm. long, its two horns slightly longer than the body, converging. 
In wet plaees, southern Georgia and Florida. Summer and fall. 
4. POLYPREMUM L. 
Annual glabrous herbs. Stem diffusely branched at the base: branches dichotomous, 
four-angled. Leaves basal and clustered, cauline and opposite: blades narrow, the bases 
dilated and somewhat connate. Flowers solitary and sessile in the forks of branchlets and 
axils of the leaves. Calyx longer than the corolla : lobes 4 or 5, somewhat foliaceous, rigid. 
Corolla campanulate : tube slightly constricted near the top: lobes 4 or 5, shorter than the 
tube, imbricated, bearing a ring of villous hairs at their junction with thetube. Stamens 4 
or rarely 5, adnate to about the middle of the corolla-tube. Ovary 2-celled : style very short, 
tipped with a capitate or somewhat 2-lobed stigma. Ovules numerous in each cavity, at- 
tached to placentae which are fixed by their bases totheseptum. Capsule slightly 2-lobed, 
somewhat flattened contrary to the septum, loculicidal. Seeds numerous, smooth. 
1. Polypremum procümbens L. Stems diffusely branched, often tufted, the branches 
erect or spreading, 1-3 dm. long: leaf-blades acute, obscurely scabrous in the margins with 
spine-like hairs, dilated at the base and somewhat connate by their narrow stipules : flow- 
ers axillary or in small terminal cymose clusters: calyx about 3 mm. high ; lobes lanceo- 
late, with a strong midrib, scarious margins and spine-like hairs: corolla white : capsules 
obovoid or subglobose, about 2 mm. long, flattened contrary to the septum, each tipped with 
the short style : seeds numerous, subglobose or obscurely angled, 0.4 mm. in diameter. 
In dry sandy soil, Pennsylvania to Florida and Texas. Also in the West Indies and Mexico. 
6. BUDDLEIA L. ; 
Shrubs or trees, or shrubby herbs, usually with pubescent, scurfy or granular foliage. 
Leaves opposite: stipules evident, but sometimes a mere line. Flowers in dense heads or 
more rarely in open panicles. Calyx campanulate, 4-lobed or rarely 5-lobed. Corolla 
rotate-campanulate, or sometimes salverform: tube straight or curved: lobes broad. 
Stamens 4 or rarely 5: filaments adnate to the corolla-tube, sometimes up to the throat. 
Ovary 2-celled : styles united. Capsule globular or oblong, septicidally 2-valved, the valves 
mostly 2-cleft at the apex and separating from the united placentae. 
Powers 3 i 2 i : - ntire. 1. B. Lindleyana. 
FE eee eae Petre A deett ua, E B mema 
1. Buddleia Lindleyàna Fort. A diffusely branching shrub 1-2 m. tall, the 
branches angled. Leaf-blades ovate to lanceolate, 3-9 cm. long, acuminate, entire, 
glabrous and paler beneath than above: panicles raceme-like, loosely spreading or verd 
what drooping: calyx 2-2.5 mm. long, puberulent: corolla purplish violet or Rei" 
12-15 mm. long, granular-puberulent : tube curved. R 
In waste places and about gardens, throughout the Gulf States and in some of the contiguous 
States. Introduced from China. Summer and fall. 
2. Buddleia racemósa Torr. A branching shrub, 4-11 dm. tall, the ipee 
nearly terete. Leaf-blades ovate-oblong to oblong-lanceolate or lanceolate, 2.5-1 À se 
long, acute or obtusish, coarsely toothed, broadly cuneate or truncate and often geri une 
hastate at the base, puberulent beneath: branches of the panicle terminating in & E die 
heads 5-8 mm. in diameter: calyx tomentulose : corolla 2-2.5 mm. long ; tube straight, 
upper part tomentulose. 
In rocky soil or on banks, southern and western Texas. Spring and summer. 
FAMILY 2. GENTIANACEAE Dumort. GENTIAN FAMILY. 
Annual or perennial caulescent herbs, or rarely shrubs, with à den 
and pervaded with a bitter tonic principle. Leaves typically opposite : gu 
simple, sometimes connate at the base and sheathing. Inflorescence ie } 
often congested. Flowers perfect, regular, often showy. Calyx of 2, onvo- 
more or less united sepals, persistent. Corolla of 4 or 5, or more, mostly eee 
lute, sometimes imbricated petals : limb often spreading, commonly showy : 
