Class IV. Order I. 57 



A well marked species with rather large leaves and small 

 flowers. The fruit forms a :<ort of umbel of three rays. Woods, 

 Chelsea beach island. July. Perennial. 



GALIUM APARINE. L. Common Cleavers. 



Leaves in eights, lanceolate, carinate, rough, prick- 

 ly backwards ; stem flaccid ; fruit bristly. Sm. 



Stem brittle, weak, much branched, prickly backward, leaning 

 upon other plants for support. Leaves in whorls of about eight 

 together, lance-obovate, their margin and keel rough backward. 

 Flowers numerous, small, white, on axillary and terminal pedun- 

 cles. Fruit hispid. In moist thickets. May, June. Annual. 



01. CORNUS. 



Subgenus Floivers umbelled, with a four 



leaved involucre. 



CORNUS CANADENSIS. L. Dwarf Cornel. 



Herbaceous ; upper leaves in whorls, slightly pe- 

 tioled, veined. Willd. 



A handsome plant of half a foot in height. Root creeping, 

 stem simple, ascending, surmounted at top with a single whorl 

 of six oval leaves, two of which are lower and larger. The 

 umbel of flowers is surrounded by a large white involucre of 

 four leaves, which at first sight is taken for the petals of a sim- 

 ple flower. The berries or drupes are globular and red. Among 

 the fertile stems are found a multitude of barren ones, support- 

 ing whorls of four leaves. Woods, Brookiine, Cambridge. May, 

 June. Perennial. 



CORNUS FLORIDA. Dogwood tree. 



Bigelow, Medical Botany, PI. xxviii. 



Arboreous, flowers in heads, surrounded by an in- 

 volucre of obovate leaves with recurved points. 



A conspicuous and very ornamental tree, covered early in 

 June with a profusion of large white flowers. It is below the 

 middle size, is of slow growth, and possesses a very compact 

 wood, covered with a rough broken bark. The branches are 

 smooth, covered with a reddish bark, marked with rings at the 

 8 



