934 APOCYNACEAE 
Corolla funnelform, relatively large ; lobes inequilateral, longer than the 
` 2. THEVETIA. 
Fruit a pair of follicles: herbs sometimes partially shrubby. 
Flower without a disk : leaves alternate. 3. AMSONIA. 
Flower with a 2-lobed disk : leaves opposite. 
Anther with a foliaceous connective: carpels 6-8-ovuled : stigma gla- 
brous : corolla funnelform. : 4. VINCA. 
Anther with an inconspicuous connective: carpels several-ovuled : 
stigma pubescent: corolla salverform. 5. AMMOCALLIS. 
Anthers appendaged at the base, converging around the stigma and partially 
adherent to it: corolla-lobes mostly dextrorsely convolute. 
Shrubs or trees. 6. NERIUM. 
Herbs or vines. 
Corolla appendaged within: calyx-tube partially attached to the gynoe- 
cium by the thick disk: upright herbs. 7. APOCYNUM. 
Corolla unappendaged : calyx-tube wholly free: vines. 
Stigma appendaged with a reversed cup or 5 lobes. 
Corolla funnelform, the throat widened upward. 
Calyx-lobes relatively long and narrow: scale-like glands borne 
at the base of the calyx within. 8. URECHITES. 
Calyx-lobes relatively broad and short: scale-like glands wanting. 9. RHABDADENIA. 
Corolla salverform, the throat narrowed upward. 10. ECHITES. 
Stigma merely thickened. 11. TRACHELOSPERMUM. 
1. VALLESIA R. & P. 
Shrubs, with branching stems. Leaves alternate, relatively few : blades entire. Flow- 
ers in long-peduncled cymes becoming opposite the leaves. Calyx-lobes 5, relatively short. 
Corolla salverform : tube swollen into a short neck which is constricted at the mouth: lobes 
5, shorter than the tube, equilateral. Stamens adnate up to the throat of the corolla-tube : 
anthers cordate, unappendaged. Disk wanting. Carpels 2. Stigma clavate. Drupe 
mostly from 1 carpel, 1-2-seeded. Seeds clavate, naked. 
1. Vallesia glàbra Cav. Shrub several m. tall, the bark pale. Leaves remote; 
blades elliptic to oblong or oblong-lanceolate, 4-7 cm. long, acute or slightly acuminate, 
fleshy-leathery, glabrous, short-petioled : cymes few-flowered : calyx-lobes triangular, less 
than 1 mm. long: corolla white: tube 5-6 mm. long: lobes spreading, 3-4 mm. long ; 
drupe narrow, 10-14 mm. long, rather dry. 
In thickets, Key West, Florida. Alsoin tropical America and Chile. 
2. THEVETIA L. 
Shrubs or trees, with stout branches. Leaves alternate, numerous: blades narrow, 
entire. Flowers solitary or few together. Calyx-lobes 5, relatively long. Corolla funnel- 
form : tube dilated into a throat not constricted at the mouth : lobes 5, longer than the tube, 
Inequilateral. Stamens adnate up to the bearded throat of the corolla: anthers unappen- 
daged. Disk lobed. Carpels 2. Stigma 2-pointed. Drupe from 2 carpels, broad, a4 
seeded. Seeds rather triangular, naked. 
1. Thevetia Thevétia (L.) Millsp. Branching shrub. Leaves approximate ; blades 
narrowly linear, 8-16 mm. long, lustrous above, slightly revolute, glabrous, sessile : calyx- 
lobes lanceolate, 5-7 mm. long, acuminate : corolla saffron-colored ; tube 2-2.5 cm. er 
lobes ascending, 3-4 cm. long : drupe depressed, 3-4 cm. broad. [Thevetia neriifolia Juss. 
In dry soil, Key West, Florida. Also in tropical America. 
3. AMSONIA Walt. 
Herbs. Leaves alternate: blades entire. Flowers in terminal thyrsoid or cory mbose 
cymes. Calyx-lobes 5, acuminate. Corolla mainly salverform : tube slightly dilated up- 
ward, villous within: lobes narrow. Disk wanting. Stamens included: anthers unap- 
pendaged. Carpels 2, connected by the slender styles. Stigma appendaged by a reflexed 
membrane. Follicles 2 together, erect, several-seeded. Seeds unappendaged. 
A. Corolla or corolla-lobes pubescent without. dovici 
Leaf-blades densely white-tomentose beneath: follicles pubescent. 1. A. Lu — 
Leaf-blades glabrous beneath or rarely with scattered hairs: follicles glabrous. 
Leaf-blades relatively broad, oval to broadly oblong-lanceolate, not glaucous sonia. 
beneath at maturity, not callous-margined. 2. A. Am 
Leaf-blades relatively narrow, lanceolate to linear-lanceolate, glaucous be- salicifolia 
neath at maturity and callous-margined. B d A 
B. Corolla glabrous without. igida. 
Leaf-blades elliptic, glaucous beneath. b enm 
Leaf-blades oblong, linear or linear-filiform, green beneath. 
