1906] Fernald. Some new or little known Cyperaceae 161 



p. 377; Rhododermis Van Heurckii Heydrich, Beihefte zuin Botan- 

 ischer Centralblatt. Vol. XIV, p. 246, PI. XVII. The fronds of this 

 species are cushion-shaped, of dense cellular structure, growing chiefly 

 at the edges of Zo.'^fera blades; they occur also on the surface of the 

 blade, but do not develop as fully as at the edges, where their thickness 

 is such that they sometimes show even to the naked eye as distinct 

 prominences. R. Genrgii was found abundantly at Wood's Hole, 

 Mass., in April, 1905; has since been found at Harpswell, Maine, 

 Revere Beach, Mass., and Rocky Point, R. L; probably it occurs in 

 •spring all along the coast. 



The three species of Rhododermi.s mentioned above are all that have 

 been described in the genus; it is satisfactory to add them all to our 

 flora at the same time. 



Malden, JNIassachusetts. 



SOME NEW OR LITTLE KNOWX CYPERACEAE OF 

 EASTERN NORTH AMERICA. 



M. L. FEIiXALD. 



{Coyitinued from page 130.) 



SciRPUS hudsonianus (Michx.), n. comb. Eriophorum alpinum 

 L. Sp. 53 (1753), not Srirpn^ alpinus Schleicher in Gaud. Fl. Helv. 

 i 108 (1828). Linaqro.sfis alpina Scop. Fl. Carn., ed. 2, i. 48 (1772). 

 Eriophorum hudsonianum Michx. Fl. i. 34 (1803). Trichophorum 

 alpinum Pers. Svn. i. 70 (1805). Srirpu.^ Trichophorum Asch. & 

 Graebn. Syn. ii. kh. 2, 301 (1903). 



I have recently discussed this plant at length ' and the reasons why 

 it should be considered a Scirpus^ rather than an Eriophorum-. The 

 ruling of the International Congress at \'ienna requires the retention 

 of the earliest available specific name, and since there is already a 

 Scirpus alpinus of Schleicher, it is necessary to take up Michaux's 

 name which was given to a plant clearly identical with the Liimean 

 Eriophorum alpinum. 



1 llHODOKA, vii. 131, 132 (1905). 



