Asclepiadaceae 309 
ular masses, |—2 masses in each sac, connected with the stigma in 2’s or 4’s by 5 
glandular bodies alternate with the anthers. Carpels 2, superior, their ovaries and 
styles distinct, their stigmas united into a head. Fruit of 2 follicles. Seeds many (ours), 
flattish, long-bearded. 
A. Leaves cordate-clasping at base; hoods of the crown between stamens and corolla 
without horns inside. ACERATES (p. 309) 
AA. Leaves not clasping; hoods of the crown between stamens and corolla each with 
a horn inside. ASCLEPIAS (p. 309) 
ACERATES GREEN MILKWEED 
Herbs, perennial; juice milky. Leaves in ours opposite, thick, ovate or ovate- 
lanceolate, 5—13 cm. long. Flowers green or purplish. Calyx 5-parted or -divided; 
segments acute, glandular within. Corolla deeply 5-cleft. Crown neither horned nor 
crested within, of 5 hoods; hoods involute-concave or somewhat pitcher-shaped. _Sta- 
mens alternate with the petals; pollen-masses | in each sac, oblong, pendulous. Stigma 
5-lobed. (Gk. a—without, kerates—horns; they lack the stamen-horns of Asclepias.) 
U. (Gomphocarpus cordifolius.) A. cordifolia Benth. 
ASCLEPIAS MILK WEED 
Leaves entire. Calyx 5-parted or -divided, usually small; segments or sepals 
acute, often glandular within. Corolla deeply 5-parted. Crown of 5 hoods; hoods 
erect or spreading, concave, each with a horn within; horn subulate, incurved.  Fila- 
ments united into a tube; pollen-mass | in each sac, pendulous. Stigma nearly flat, 
5-angled or -lobed. Follicles usually thick, acuminate. (The Greek name of the 
god of healing; some of the plants are medicinal. ) 
A. Leaves white-tomentose; stem 6—18 dm. high; leaves oval to oblong. E. 
Ie speciosa Torr. (Woolly Milkweed) 
AA. Leaves glabrous; either the stem only 1.5—-3 dm. high or else the leaves linear to 
lanceolate. 
B. Stems erect, 6—15 dm. high; leaves many, in whorls of 2—6, linear to lanceo- 
late, 7.5—15 cm. long; corolla-lobes 4 mm. long; follicles 5—7.5 cm. long. W. 
E A. mexicana Cav. (Whorled Milkweed) 
BB. Stem decumbent, 1.5—-3 dm. high; leaves 6—8, opposite, rounded-ovate, 
2.5—5 cm. long; corolla-lobes 10 mm. long; follicles 2.5——-5 cm. long. E. 
A. cryptoceras Wats. (Dwarf Milkweed) 
CONVOLVULACEAE Morning-glory Family 
Herbs (ours) or shrubs or trees; juice often milky. Stems prostrate or twining 
or erect (not ours). Leaves none or mere scales, or alternate; stipules none. Flowers 
axillary, regular, the parts in 4’s or 5’s. Sepals usually distinct, persistent. Corolla- 
limb entire or lobed. Stamens as many as the corolla-segments and alternate with them, 
usually low down on the corolla-tube. Ovary 2—6-celled; cells 1—-2-ovuled; styles 
1 or 2 or 4; stigma terminal or introrse. Fruit a capsule or sometimes fleshy. Seeds 
large. 
A. Plants green, not parasitic; leaves ordinary, wide. CONVOLVULUS (p. 310) 
AA. Plants red or yellow, without green, parasitic; leaves mere scales. 
; CuscuTA (p. 310) 
