ONAGRACEjE. (evening primrose family.) 139 
5* CIRCLE A, Tourn. Enchanter’s Nightshade. 
Calyx-tube slightly prolonged, the end filled by a cup-shaped 
disk, deciduous : lobes 2. Petals 2, inversely heart-shaped. Sta¬ 
mens 2. Pod reflexed, obovate, 2-celled, 2-seeded, bristly with 
hooked hairs. — Low inconspicuous perennials, with opposite thin 
leaves on slender petioles, and small whitish flowers in racemes. 
(Named from Circe , the enchantress.) 
1. C. Lutetiana, L. Stem mostly pubescent; leaves ovate , 
slightly heart-shaped , pointed, slightly toothed; bracts none ; hairs of 
the fruit bristly. — Moist woodlands. July. — Stem l°-2° high. 
2. C. alpina, L. Low , smooth and weak ; leaves heart-shaped , 
shining , coarsely toothed; bracts minute; hairs of the fruit soft and 
slender. — Cold woods among mosses, common northward. July. — 
Plant 3'-8' high, with very thin leaves on longer stalks than in No. 1. 
Suborder II. HALORAGEjE. The Water-Milfoils. 
6. PROSERPINACA, L. Mermaid-weed. 
Calyx-tube 3-sided, the limb 3-parted. Petals none. Stamens 
3. Stigmas 3. Fruit bony, 3-angled, 3-celled, 3-seeded, nut-like. 
— Low' perennial herbs, with the stems creeping at the base 
(whence the name, from proserpo, to creep), alternate leaves, and 
small perfect flowers sessile in the axils, solitary or 3 - 4 together. 
1. p. palustris, L. Leaves lanceolate , sharply serrate , the 
lower pectinately-cut when immersed in water; fruit sharply 3-angled. 
— Wet swamps. June - Aug.— Stigmas purple, cylindrical. 
2. P. pectinsicea, Lam. Leaves all pectinate , the divisions 
linear-awl-shaped; fruit rather obtusely angled.—Sandy swamps, 
chiefly eastward. Smaller than the last. 
7. MTBIOPHtLLrM, Vaill. Water-Milfoil. 
Flowers monoecious or polygamous. Calyx of the sterile flowers 
4-parted, of the fertile 4-toothed. Petals 4, or none. Stamens 
4-8. Fruit nut-like, 4-celled, deeply 4-lobed : stigmas 4, recurv¬ 
ed.— Mostly immersed aquatics, perennial. Leaves crowded, 
often whorled ; those under water pinnately parted into capillary 
divisions. Flowers sessile in the axils of the upper leaves ; the 
uppermost staminate. (Name from pvpios, a thousand , and <f>v\\ov , 
a leaf.) 
