1 889. J BOTANICAL GAZETTE. 1 95 



insi(B (Hook.) Dum., var. Sullivantii Spruce, described in 

 lull in his Hefaticce of the Amazon, p. 62. 



Phragmicoma clypeata (p. 73) becomes Lejeunea clypeata 



(Schw.) Sulliv., to which L. calycuIataTzy\. (p. 69) is reduced 

 as a synonym based on an examination of Taylor's specimen 

 in the Gray Herbarium. L. cucullata (p. 71 not of Nees) be- 

 comes L. diversilpba Spruce, the true L. ctictdlata Nees 

 being a Javan plant. 



jL. ec/iiuataTayl. (p. 72) is properly JL. calcarea Libert, as 

 the species was originally named in 1820. The use of Tay- 

 lor's name illustrates one of the pernicious principles that has 

 been introduced into the system, and is even now maintained 

 by some botanists. The plant was first described by Hooker 

 in 1816 under the varietal name "Jungermannia hamatifolia 

 B echinata." Madamoiselle Libert describes it as a species 

 !n 1820 as a type of her new genus Lejeunea with the specific 

 name, " calcarea" ; Taylor, in 1844, rejected Madamoiselle 

 Libert's name and revived the varietal name of Hooker, 

 which plainly has no claim to priority, not having been used 

 by him as a specific name. 



L. testndinea Tayl., Z. cyclosti-pa TayL, L. foly-phylla 

 Tayl. and L. longiflora Tayl., should all be stricken from 

 our flora, Spruce having pointed out the fact that they are 

 all South American species, erroneously reported from Ohio 

 by mistakes in labels. 



Madotheca (p. 74) must be replaced by the pre-Linna?an 

 name Porella of Dillenius. It is a singular fact that the 

 name Madotheca should have remained so long undisturbed, 

 since Linmeus himself adopted Dillenius' name, although he 

 erroneously placed the plant among the Musci. Our species 

 become P. finnata L. (= Madotheca porella, p. 76), P. 

 flatyfhylla (L.) Lindb. (p. 75), P. thuja (Dicks.) Lindb. 



(p. 75), ^ rivularis (Nees/) (p. 74), and P. Sultiwntt 



(Aust.) (p. 75). Blepharozia (p. 80) returns to Ptilidium and 

 our species is P. ciltare (L.) Nees. Another erroneous prin- 

 ciple of nomenclature is here illustrated. Blepharozia \vas 

 established as a sectional or subgeneric name by Dumortier 

 in his Sylloge, 183 1, but was not raised to generic rank until 

 ^835; meanwhile (1835) Nees had established for the same 

 plant the genus Ptilidium, which must stand as the first 

 generic name. 



Sendtnera (p. 81) becomes Herberta. as noted above, and 

 our species is H. adunca (Dicks.) S. Gray. 17 



17 Our species has erroneously been referred to S. juniperina, which is a much more 

 robust species of tropical America. 



