128 allan hancock pacific expeditions vol. 3 



Species Steriles 



R. divaricata....GuU of California R. pacifica California 



R. rosea Gulf of California R. palmettiformts California 



R. occidentalis West Indies 



Species Inquirendae 



R. dichotoma New Zealand R. anastomosans E. Indies 



R. adnata Japan R. rhizoidifera E. Indies 



R. javanica Java R. epimenioides N. Zealand 



R. cinnabarina Indian Ocean R. 7na?nillaj-is Martinique 



R. cuneifolia (Hook. f. & Harv.) Taylor 



{Phyllophora cuneifolia Hook. f. & Harv.) Falkland Islands 



B. Stipes truly sympodially branched in addition to basal stoloniferous 

 branching; tetraspores as far as known confined to sori below frond- 

 apices Subgenus Dendrymenia 



V Sec. 5. DENDRYMENIAE 



Plants low, 3-5 cm. high 



Blades mainly dichotomous, usually ending in a bilobed 



apex; type: — New Zealand R. leptophylla 



Blades showing a tendency toward palmate, often ending in 

 a 4-6 lobed flabellum ; type : — Hawaii . R. leptophylloides 

 Plants longer than 5 cm. 



Blades conspicuously flabellate, broadly cuneate from the 

 stipe, or lower segments spreading almost at right angles 

 Flabella each with an individual stalk, branching from 

 the main stipe 



Basal parts possessing numerous, branched stolons; 

 stipes proliferous below; blades not over 150 |x thick; 



type: — California R. rhizoides 



Basal parts imperfectly known; blades 150-400 \i 

 thick; type: — Gulf of California . R. Hancockii 

 Blades sessile 



Blades developing at point of union with the stipe so 

 as to form an amplexicaul structure at each branch; 



type: — Chile R. Skottsbergii 



Blades merely sessile or somewhat decurrent, not 

 amplexicaul; type: — Chile . , . R. flabellifolia 



