SUPPLEMENT 
No. 1. Additional Species discovered since the publication of the 
First and Second Parts. 
Part I. — MELANOSPERMEiE. 
Part 1, p. 61, add, 
I * TURBIN AM A. Lamour. 
Root branching. Frond alternately decompound, having a distinct stem, branches, 
vesicated leaves and receptacles. Branches filiform, simple or pinnate. Leaves spirally 
inserted, on long petioles, peltate, becoming inflated and changed into peltate air-vessels 
with leafy dentate margins. Receptacles cylindrical, verrucose, much branched, rising 
from the petiole of the leaf, near its base, on the upper side ; of similar structure to 
those of Sargassum. 
A genus consisting of two or three tropical or subtropical Algae, distinguished from 
Sargassum by its peltate leaves, which are at first thin and flat, but afterwards become 
hollow and are changed into flat-topped, margined air vessels. 
1. Turbinaria vulgaris , A g. ; frond membranaceo-coriaceous ; leaves on an inflated 
petiole obconic or top-shaped, the margin entire or toothed, the disc naked. J. Ag. Sp. 
Alg. 1, p. 267. Turbinaria denudata and T. decurrens, Bory. Fucus turbinatus , 
Turn. Hist. t. 24, Jig. a. and b. 
Hab. At Key West, Mr. Ashmead. (v. v.) 
Root a mass of branching fibres, as thick as sparrow’s quills, loosely entangled 
together. Fronds several from the same mat of roots, either quite simple, or dividing 
near the base into three or four principal branches ; or pinnately compound by the 
evolution of lateral branches, erect and rigid, 6-10 inches high, cylindrical and smooth. 
Leaves spirally inserted, spreading to all sides, patent, rigid ; petioles at first cylindrical, 
R 
