96 Howe : Phycological studies 



corticating filaments of stipe compactly cymose-fastigiate, the 

 ultimate divisions scarcely longer than broad, truncate, truncate- 

 obtuse, or commonly with expanded truncate-capitate apices U. cyathiformis. 



Udotea conglutinata (Ell. & Soland.) Lamour. Hist. Polyp. 



312. 1816 

 Corallina congbitiiiata Ell. & Soland. Nat. Hist. Zooph. 125. pi. 



25./. 7. 1786. 

 Flabellaria conghitinata Lamarck, Ann. Mus. Hist. Nat. 20: 301. 



1813. 



Plants 3-9 cm. high, from a bulbous, subfusiform, or fascicu- 

 late-funicular rhizoidal base, light-, yellowish-, or albescent-green, 

 more or less strongly calcified ; stipe simple, subterete below, 

 commonly flattened, expanded, and cuneate above, 0.5-3.0 cm. 

 long, mostly 1.5-7.0 mm. wide, corticated, its surface very minutely 

 tomentulose-spongiose or somewhat compact and smooth : transi- 

 tion in structure from stipe to flabellum gradual, the flabellum un- 

 corticated except at the very base, plane, semiorbicular, cuneate- 

 obovate, subreniform, spatulate, or rarely cuneate-ligulate, 1.5-7 

 cm. long, 0.5-1 1 cm. wide, subentire, erose-sinuate, or irregularly 

 lobate, rarely with innovating conformable lobes, for the most part 

 distinctly zonate, the base cuneate, cuneate-truncate, or occasion- 

 ally subarcuate, the surface longitudinally strigose, or commonly 

 spongiose or subvelutinous : filaments of the flabellum interwoven 

 in several or many layers, in most cases forming a superficial 

 tomentulose nap by repeated dichotomies, the ultimate branches 

 usually short, tortuous, and often somewhat divaricate, each fila- 

 ment, except in a very juvenile state, enclosed in a porose cal- 

 careous sheath, destitute of lateral branches or appendages, con- 

 stricted just above the dichotomies and sometimes here and there 

 in intervening parts, rarely subtorulose, 28-60 /i in diameter (de- 

 calcified ; often larger under a dichotomy) ; pits of the calcareous 

 sheath rounded or angular, mo.stly 8-20 /i in diameter ; branches 

 forming the stipe-cortex slender, rather flexuous ar^d tortuous, 

 somewhat loosely and irregularly fastigiate, the ultimate divisions 

 mostly finger-shaped, subacute or taper-pointed, 8-19 /i in diameter. 

 [Plate 2 ; plate 8, figures i 1-13.J 



Type locality : Bahama Islands. 



Distribution: Bermuda, southern Florida, and the West 

 Indies. 



Udotea cyathiformis Decaisne, Ann. Sci. Nat. II. 18: 106. 1842 



Udotea conglutinata Vickers, Phyc. Barbad. I : //. J2. 1908 ; 



probably also Harvey, Ner. Bor.-Am. 3: //. :f.oC. 1858. 



