214 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 12 



KEY TO GENERA 



1. Plants generally foUaceous Kallymenia 



1. Plants with narrow, strap-shaped segments .... Callophyllis 



KALLYMENIA J. Agardh, 1842 



Thallus flat to foliaceous, simple, lobed or cleft, sometimes proliferous 

 or perforated ; structurally showing a loose medulla of thin-branched fila- 

 ments and rhizoids, the cortex of cells smaller toward the surface, larger 

 and less close placed within ; sporangia tetrapartite, scattered in the cortex; 

 carpogenic branches several on a common supporting auxiliary cell, cysto- 

 carps wartlike, immersed or projecting, scattered, the carpospores formed 

 in masses with a filamentous investment. 



KEY TO SPECIES 



1. Blades linear, commonly narrowly oblanceolate, but occasionally 

 forked K. tenuifolia 



1. Blades broadly foliaceous 2 



2. Stalk compressed 3 



2. No compressed stalk, the segments foliaceous to the base, even 

 when narrow K. latiloba 



3. Blades subsimple, to about 150 /x thick K. Setchellii 



3. Blades deeply subdigitately lobed, to 250 fx thick or more . . 



K. mutiloba 



Kallymenia tenuifolia n. sp.^^s 

 Plate 72, Figs. 1-4 



Plants consisting of delicate narrowly oblanceolate rose-red slightly 

 nitent blades reaching 14 cm in length, 16 mm in width; the blades 

 simple, occasionally 2-3-furcate, or lacerate, commonly proliferous from 

 the margin or a broken end; base long attenuate, tip rounded, thickness 

 35-40 jx ; in section the medulla of 3-4 layers of intertwined elongate cells 

 with moderately thick firm coalescent walls, the cortex of one, occasion- 

 ally two layers of squarish cells about 7-9 /i, thick, and when seen in sur- 



128 Kallymenia tenuifolia n. sp. — Plantae praeditae laminis simplicibus anguste 

 oblanceolatis, ad 14 cm long., 16 mm lat., interdum 2-3 furcatis; basi attenuata, 

 cacumine rotundato, crassitudine 35-40 \x,', cystocarpis minutis, dispersis, circa 150 

 \i diam. Planta typica in loco dicto I. Soccoro, Mexico, legit W. R. Taylor no. 39- 

 67, 18 Mar. 1939. 



