MORNING GLORY FAMILY. CONVOLVULACEAE.

Fig 142. [Small Bindweed. Convolvulus arvensis] L.

Small Bindweed. Convolvulus arvensis L. Color of seeds dull dark brown, coarsely roughened, oval, 3–4 mm. long, one face convex, the other face sloping to the edges from a broad, central ridge, becoming mucilaginous when soaked in water. Introduced from Europe. Seldom, if ever, seeding in Michigan. On dry, poor land.

Fig 143. [Hedge or Great Bindweed. Convolvulus sepium] L.

Hedge or Great Bindweed. Convolvulus sepium L. Pod nearly globose, about 8 mm. in diameter, usually covered by the bracts and calyx; seeds dull black or dark brown, roughened, oval, about 5 mm. long, one face convex, the other face sloping to the edges from a central ridge. Native to this country. Seldom seeding in Michigan. On low land.

Fig 144. [Field Dodder. Cuscuta arvensis] Beyrich.

Field Dodder. Cuscuta arvensis Beyrich. A pale yellow leafless parasitic vine; seeds dull, yellowish brown, minutely pitted, considerably resembling those of red clover, broad oval, ovoid or spherical, .7–1 mm. long, one side rounded the other often with two flat surfaces terminating in a ridge. Not uncommon with alfalfa.

Fig 145. [Flax Dodder. Cuscuta Epilinum] Weihe.

Flax Dodder. Cuscuta Epilinum Weihe. Stems very slender, yellow or red, a parasitic vine; seeds dull, yellowish to dark brown, minutely pitted, nearly spherical, oval, ovoid, 1–1.5 mm. long. Introduced from Europe.

Fig 146. [Clover Dodder. Cuscuta Epithymum] Murr.

Clover Dodder. Cuscuta Epithymum Murr. Stems very slender, a parasitic vine; seeds oval to spherical, dull, pitted, color yellowish, light to dark brown, light green to purple, about 2 mm. long. Introduced from Europe. Occasionally found on red clover.

Fig 147. [Gronovius Dodder. Cuscuta Gronovii] Willd.

Gronovius Dodder. Cuscuta Gronovii Willd. Seed light to dark brown, surface minutely granular, free from gloss, a few spherical, most of them indented as they dry or variously angled where they crowded against each other in the pod, 1.5–1.7 mm. in diameter. Species of dodder are difficult to distinguish one from the other. This is common on low land, where it draws nourishment from a great variety of plants, such as willows, balsams, nettles.

Fig 148. [Spanish Dodder. Cuscuta planiflora] Tenore.

Spanish Dodder. Cuscuta planiflora Tenore. Color light to dark pink, purple buff, olive green; surface well roughened, almost reticulated, in shape flattened on one side, ovoid, oval angled, indented in great variety, 0.7–1.2 mm. long.