Yale University Herbarium

YU.091847

Phycotheca Boreall-Americana. Collins, Holden, and Satchell.

764. Vaucheria tuberosa A. Br.

A. Braun in Kuetzing, Tab. Phyc. Vol. VI, p. 23, Pl. LXV, 1856.
Wolle, F. W. Algae of the U. S., p. 154, Pl. CXXX, 1887.
De Toni, Syll. Alg., Vol. I, p. 406, 1889.

Forming dark green tufts attached to logs and debris in San Marcos River, near San Marcos, Texas, Dec., 1896.

De A. SAUNDERS.

This anomalous plant has regular dichotomous branching with the constrictions at the forkings tinged with red, and the irregular lateral branches (stolons) repeatedly constricted. The tuber-like swellings at the apices are spherical, one-eighth to one-quarter mm. diam., the vegetative filaments average one-tenth mm. diam.

De A. S.