966 CUSCUTACEAE 
longer than the subtending petioles or Jonger than the leaves: bracts ovate or oblong- 
ovate, 2-3 em. long: calyx glabrous, enclosed by the bracts: sepals oblong to oblong-lan- 
ceolate, 10-13 mm. long, obtuse or acutish : corolla 4-5 em. long, pink or rose-purple ; 
limb 5-7 em. broad, sometimes variegated : capsules ovoid-globose, 1 cm. in diameter. 
In thickets and along fences, Nova Scotia to Montana, North Carolina and Utah. Summer. 
2. Convolvulus sepium L. Similar to C. Americanus in habit : leaf-blades relatively 
broader and more rounded to the apex, the basal lobes rounded or angulately toothed, 
directed backward, not spreading. 
In thickets and waste places, locally naturalized in North America, except the extreme north. 
3. Convolvulus répens L. Softly pubescent. Stems trailing or twining, sometimes 
twisted : leaf-blades typically narrowly or broadly sagittate, 5-8 cm. long, cordate at the 
base ; petioles about } as long as the blades except the lower ones: peduncle surpassing 
the leaves or at least the petioles: bracts ovate-oblong or oblong-lanceolate, 1.5-2.5 cm. 
long : calyx included by the bracts, glabrous or glabrate: sepals lanceolate or oblong to 
ovate-lanceolate, acute : corolla white or pinkish, 4-5 cm. long; limb 4-6 cm. broad, 
undulate : capsules globular, about 1 cm. in diameter. 
In dry soil or old fields, Virginia to South Dakota, Florida and Texas. Spring and summer. 
4. Convolvulus spithamaéus L. Finely pubescent. Stems erect or decumbent, 1- 
7 dm. long, not twining, simple or sparingly branched : leaf-blades oblong-ovate or fiddle- 
shaped, 4-10 cm. long, apiculate, entire, rounded or subcordate at the base ; petioles 5-15 
mm. long: peduncles longer than the leaves or shorter : bracts ovate or oblong, 1.5-3 cm. 
long : calyx delicate: sepals acute, or acuminate, as long as the bracts or shorter : corolla 
white or pink, 3-4 cm. long; limb 4-6 cm. broad, undulate: capsules globular, about 1 
cm. in diameter. 
In dry or rocky soil, Nova Scotia to the Northwest Territory and Florida. Spring and summer. 
5. Convolvulus arvénsis L. Glabrate. Stems branched at the base; branches 
prostrate or low twining: leaves alternate ; blades oblong or ovate-sagittate or linear-has- 
tate, 1-5 cm. long, obtuse or acutish ; petioles seldom 3 as long as the blades: peduncles 
shorter than the subtending leaves: calyx naked : sepals oval to suborbicular, obtuse or 
acutish, 3-3.5 mm. long: corolla white or rose-tinged ; limb 1.5-2 cm. broad: capsules 
oval or ovoid, 5-7 mm. long. 
; In waste places and fields, commonly established in northeastern North America and sparingly so 
in the southeastern United States. Native of Europe and Asia. Spring and summer. 
6. Convolvulus hermannioides A. Gray. Silky tomentulose. Stems commonly 
branched at the base; branches spreading or procumbent, 3-15 dm. long: leaf-blades 
ovate, oblong or oblong-lanceolate, 1.5-7 dm. long, sinuate or incised-toothed, cordate at 
the base ; petioles 3 as long as the blades or shorter: peduncles shorter than the subtend- 
ing leaves: sepals becoming about 1 cm. long, auricled at the base : corolla white, about 
2-2.5 cm. long; limb 1.5-2 cm. broad, angulate: capsules depressed, 8-10 mm. high in- 
cluding the long beak. 
On dry prairies, Texas. Spring to fall. 
7. Convolvulus incànus Vahl. Cinereous. Stems often branched at the base; 
branches mainly procumbent, 3-10 dm. long : leaf-blades very variable, linear-sagittate be 
lanceolate or hastate, with more or less lobed basal auricles, or pedate, 2.5-5 cm. long, 
often mucronate: peduncles 1—2-flowered : sepals becoming 6-8 mm. long, not auricled at 
the base: corolla white or pink, about 12 mm. long, and 15 mm. broad, the lobes acumi- 
nate : capsules 6-8 mm. high, including the short beak. 
On dry hills and prairies, Nebraska to Arkansas, Colorado, Texas and Arizona. Spring and summer 
8. Convolvulus Havanénsis Jacq. Minutely pubescent or glabrate. Stems branch- 
ing at the base; branches shrubby, procumbent or somewhat twining : leaves namero ; 
blades leathery, oblong, elliptic or suborbicular, or commonly slightly broadest pelot i - 
middle, 1-2.5 cm. long, obtuse or retuse and mucronate, somewhat revolute, deudas s : 
peduncles several-flowered or rarely 1-flowered : sepals ovate, becoming 2.5-3 mm. edis 
corolla white, 10-12 mm. broad, the lobes acute: capsules ovoid, 4-5 mm. long, tree! 
splitting into several lanceolate valves. 
In sandy soil, peninsular Florida and the Keys. Also in the West Indies. Throughout the year. 
FAMILY 3. CUSCUTACEAE Dumort. DoppER FAMILY. 
Herbaceous parasites, with white, yellow or orange foliage which ue 
contains a coloring matter, possibly chlorophyll. Stems starting from the gro 
sometimes 
