2. SPHÆROCÁRPUS, Micheli. ([Pl. 22.])
Thallus lobed, without costa or epidermis. Involucres sessile, obconic or pyriform, perforated at the apex, continuous with the thallus at base. Calyptra closely investing the single globose indehiscent capsule, crowned with a deciduous point. Spores globose, muriculate, remaining united in a coccus. Antheridia borne in follicular bodies on the surface of a separate thallus.—An anomalous genus, perhaps more closely related to the Jungermanniaceæ. (Name from σφαῖρος, a sphere, and καρπός, fruit.)
1. S. terréstris, Smith. Thallus orbicular, 3–6´´ broad, covered by the clustered inflated involucres, which are nearly 1´´ long, 3–4 times the length of the capsule; coccus 102–127 µ wide, indistinctly lobed. (S. Michelii, Bellardi.)—In cultivated fields, mostly southern. (Eu.)
ADDITIONS AND CORRECTIONS.
Page 59.—Argemone Mexicana. Collected at Merodosia, Ill., with white flowers, by A. B. Seymour.
Page 75.—Insert after Cleome integrifolia—
C. spinòsa, L. Viscid-pubescent, 3–4° high; a pair of short stipular spines under the petiole of each leaf; leaflets 5–7, oblong-lanceolate; flowers large, rose-purple to white; stamens 2–3´ long; stipe of the linear pod about 2´ long. (C. pungens, Willd.)—An escape from cultivation, near Mt. Carmel, Ill. (Schneck), and in waste grounds southward; also on ballast. (Int. from Trop. Amer.)
Page 86.—Arenaria Grœnlandica. Found on Mt. Desert Island, Maine (Rand).
Page 87.—Stellaria borealis. In the mountains of northern N. J.