PISONIACEAE 489 
minutely black- dotted on the uc denen surface: calyx white or purple; 
tube glabrous; limb campanulate, 1-1.5 mm. long, sparingly pubescent: fruit 
obpyramidal, 3.54 mm. long, 5 aele ed, the grooves xn ps4 per the 
top flat.— Waste places, fields, r roadsides and hammocks, Coa 1 Plain’ and 
a ern ae provinces, Fla. to Tex., Ariz., AE and i 'o— —(W. I. 
Mex., C. A ) 
FAwxinLy 10. PISONIACEAE — PisoNiA FAMILY 
Shrubs, trees, or vines. Leaves opposite or alternate: blades simple. 
Flowers perfect, dioecious or rarely monoecious, cymose. Calyx o 
united sepals, eampanulate, tubular, or funnelform. Corolla wanting. 
Androecium of 5-30 stamens. Gynoecium l-earpellary. Ovary 1-celled: 
style terminal. Fruit an anthocarp.—Three genera and about 40 species, 
mostly tropical. 
Fruit angular, with rows of glands: calyx broad. 1. PISONIA. 
Fruit terete, glandless: calyx narrow. 2. TORRUBIA. 
PISO A [Plum .] L. Armed woody vines, or shrubs or trees. Leaves 
EN eae ntire. Flowers in compound cymes. Calyx broadly funnel- 
form or rotate, with a thin undulate recurved edge. Fruit dry, with rows of 
glands.—About 25 species in tropical and subtropical regions. 
Stem mostly climbing, armed: leaf-blades abruptly pointed or shorencuninate: fruits 
glandular from the base to the apex. 1. P. aculeata. 
Stem erect, unarmed: aa blades blunt or retuse: fruits glandu- 
lar above the middle 2. P. rotundata. 
1. P. aculeata L. Woody vine with branching thorns, the ultimate divisions 
na or hooked, very ed or rar p. ereet and somewhat tree-like: leaf- 
blades Es val, or ovate, 2.5-7 
long: pedicels senders E be eal 
longer than wide: fruit slender, 3-3.5 mm. 
ee e idee S-CLAWS. PULL- 
AND-HOLD-BA OLD K.) — Hammocks, 
S pen. Fla. pe the Keys —(W. I.)—The 
calyx is usually purple. 
2. P. rotundata Griseb. Shrub or small 
tree, the bark pale: Ea. thick, 
broadly elliptie or oval, varying to obovate, 
2.5—8 cm. long, short-pe RR n densely 
flower red ealyx green or whitish, broadly 
3 mm 
funnelform, about long, to mentulose 
along the edge: fruit broadly E ide] 
obovoid, 5—6 mm. long.—(PISONIA.)— 
ede and pinelands, Florida Keys —(F. 5 ) 
2. TORRUBIA Vell. Unarmed shrubs or trees. Leaves opposite: blades 
entire. Flowers in cymes. Calyx id funnelform to tubular, with an 
ereet nearly or quite even edge, purplish, pink, green, or white. Fruit juicy, 
purplis 
without glands.—About 20 species, CAM of tropical and id a Ameriea. 
Leaf-blades glabrous: inflorescence-branches glabrous in age. 
Fruit obovoid or ellipsoid-obovoid, 8-10 mm. long, the hard 
part ellipsoid : leaf-blades oblanceolate, obovate, cune- 
ate, elliptic or oval. 
