936 APOCYNACEAE 
somewhat swollen near the top: lobes broad, spreading. Stamens included: anther 
with an inconspicuous connective. Disk of 2 glands alternating with the carpels. Carpels 
2, united by the styles. Stigma pubescent. Ovules several. Follicles 2 together, several- 
seeded. Seeds unappendaged. 
1. Ammocallis rosea (L.) Small. Stems 2-7 dm. tall, usually somewhat branched, 
pubescent, woody, at least below: leaf-blades rather fleshy, oblong or slightly narrower 
below the middle, 4-8 cm. long, rounded or retuse at the apex and mucronulate, pubescent, 
short-petioled : calyx-lobes linear-subulate, 3—4 mm. long, pubescent: corolla-tube 2.5-3 
em. long, finely pubescent, with a protruding pit behind each anther; limb white or pink 
or white with a pink eye, the lobes 1.5-2.5 cm. long, oblique: follicles cylindric, 2-3 
cm. long, pubescent. [ Vinca rosea L.] 
In sandy soil, Florida. Also in the tropics generally. 
6. NERIUM L. 
Shrubs or trees, with stout branches. Leaves opposite, numerous: blades leathery, 
entire. Flowers in terminal compound cymes. Calyx-lobes 5, narrow. Corolla rather 
salverform : tube dilated into a narrowly campanulate throat: lobes spreading, about as 
long as the throat. Stamens adnate to the corolla-tube : anthers appendaged at the base. 
Carpels 2. Stigma surrounded by the anthers. Follicles narrow. OLEANDER. 
1. Nerium Oleander L. A shrub, or a tree becoming 10 m. tall, with smooth 
branches. Leaf-blades narrowly elliptic or linear-elliptic, 6-15 cm. long, acute or acumi- 
nate at both ends, conspicuously many-nerved : calyx-lobes lanceolate, 4.5-6 mm. long, 
acuminate, puberulent : corolla showy, rose-purple; limb 3-4.5 cm. broad, the lobes 
obliquely apiculate : follicles erect or nearly so, 1-2 dm. long. 
In fields and on roadsides, Gulf States and adjacent territory. Naturalized from the Old World. 
7. APOCYNUM I. 
Herbs, with upright more or less branched stems. Leaves opposite: blades entire. 
Flowers small, in corymbed cymes. Sepals 5, acute. Corolla white or pink, campanulate : 
tube terete or angled, with 5 small appendages alternating with the stamens : lobes 5. 
Stamens adnate to the base of the corolla-tube : anthers sagittate, converging about the 
stigma and slightly adherent to it. Disk 5-lobed. Carpels 2, united only by the slender 
styles. Stigma ovoid or sometimes 2-lobed. Ovulesseveral in each carpel. Follicles 2 to- 
gether, terete. Seeds numerous, each tipped with along coma. DoGBANE. INDIAN HEMP. 
Corolla pink, 5-7 mm. long: lobes revolute. 1. A. androsaemifolium. 
Corolla greenish white, 3-3.5 mm. long: lobes erect or nearly so. 2. A. cannabinum. 
1. Apocynum androsaemifdlium L. Stems 3-15 dm. tall, like the widely-spread- 
ing branches, mostly glabrous : leaf-blades ovate, oblong or oval, 4-11 em. long, deep green 
and glabrous above, pale and more or less pubescent beneath, short-petioled : cymes rather 
lax : calyx-lobes ovate to ovate-lanceolate, 2-2.5 mm. long: corolla pink, 5-7 mm. long ; 
lobes revolute : follicles 10-17 cm. long. 
In thickets and woodlands, Anticosti to British Columbia, Georgia and Texas. Summer. 
2. Apocynum cannábinum L. Stems 8-18 dm. tall, the branches erect or ascend- 
ing, glabrous at maturity : leaf-blades oblong to ovate-oblong or oblong-lanceolate, 5-12 
em. long, glabrous, or slightly pubescent beneath, short-petioled : cymes rather dense: 
calyx-lobes lanceolate, 2.5-3 mm. long: corolla greenish white, 3-3.5 mm. long; lobes 
erect or nearly so: follicles 12-20 em. long. 
In fields and thickets, Anticosti to British Columbia, Florida and Texas. Spring and summer. 
8. URECHITES Muell. Arg. 
Twining vines, with somewhat woody stems. Leaves opposite: blades flat, entire. 
Flowers in cymes terminating axillary or terminal peduncles. Calyx-lobes 5, relatively 
long and narrow. Corolla relatively large, funnelform, the tube abruptly dilated into à 
campanulate throat. Carpels 2. Follicles 2, spreading at maturity, usually very long. 
Leaf-blades glabrous: peduncles and pedicels glabrous or a prr dod puberulent. 1. U. Andrevsii. 
M ey soft-pubescent beneath: peduncles and pedicels more or less pu- 
ent. 
, 1. Urechites Andréwsii (Chapm.) Small. Stems 3-30 dm. long, reclining da dnt 
ing, glabrous : leaf-blades leathery, oval to ovate or suborbicular, 2.5-5 em. long, 8ta ms 
paler beneath than above, short-petioled : cymes 3-5-flowered : calyx-lobes lanceo'6 
2. U. neriandra. 
