150 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 17 



Type locality: Bahia de San Francisco, Esmeraldes, Ecuador, 

 Mexican distribution: Pacific Baja Calif. — Mason 67, Isia 

 Guadalupe, April 19-22, 1925 (Herb. Calif. Acad. Sci.). Nayarit— 

 Taylor 39-643a, Isla Maria Magdalena, Las Tres Marias, May. 



Taylor's original account described two collections of this plant, — 

 the type from Ecuador, and a dredged plant from Nayarit, Mexico. The 

 latter differs from the type in habit, divaricate branching and in the 

 marginal position of the conceptacles. A third collection from Guayas, 

 Ecuador was labeled J. franciscana but not discussed. It does not agree 

 well with either of the other two and is best referred to J. annulata. 

 Because of the difference between the Ecuadorean type and the Mexican 

 specimen it seemed at first desirable to recognize the latter as a named 

 variant. However, through the kindness of Mr. J. T. Howell of the 

 California Academy of Sciences, the plant from Isla Guadalupe identi- 

 fied by Setchell and Gardner as A. fragilissima was received for exami- 

 nation. It has proved to be conspecific with the type of J. franciscana, 

 but shows some expression of the features of divergent branching and 

 lateral conceptacles of the Nayarit collection. The description above, 

 thus, modifies Taylor's original one and defines a distinctive but un- 

 common small flattened species of apparently wide eastern Pacific dis- 

 tribution. 



Amphiroa franciscana var. robusta var. nov. 



Ad forman typicam speciei, at segmentis paulo maioribus totis men- 

 suris, 400-600 fi diametro, ad 3-4 mm. longis. 



Like the species but the segments somewhat larger in all dimensions, 

 400-600 fi in diameter and to 3-4 mm. long. 



Type: Holotype is Dawson 3881, Feb. 3, 1947, in vial 2255 in 

 HAHF. 



Type locality : Acapulco, Guerrero, Mexico. 



Additional material: D. 4455, Bahia Agua Verde, Baja Calif. 



Bossea Manza 



The following account of this genus was done jointly with Dr. Paul 

 C. Silva of the University of California, Berkeley.^ Specimens cited 

 under his numbers are deposited in the herbarium of that institution. 



1 Dr. Silva's present address is Department of Botany, University of Illinois, 

 Urbana, Illinois. 



