60 THE JOURNAL OF BOTANY 



var. decandra : these varieties date back to Ledebour's Fl. Eoss. i. 

 339 (1842). So far as I can judge, the var. decandra is S. sagino'ides 

 as understood in the present communication ; and the var. mi- 

 crantha (= Si)cr(jula micrantha Ledebour Fl. Alt. ii. 183, 1830) is 

 a plant unknown to me. 



Lagerheim (in Kgl. Norske Vidensk Selsk Skr. for 1898, no. i, 



4, 1898) found the disputed Sagina (i. e., S. sagino'ides var. typica 

 Beck) in Scandinavia, and stated his view that the plant is a 

 hybrid of S. 2^vociimbens and S. sagino'ides : Lagerheim's name 

 may therefore be written x S. normanniana ; and this name is 

 not open to the objection — an objection which applies to the 

 name x S. media — that the author gave an inferior description 

 and perhaps mixed or confused his own specimens of his own 

 plant. 



It is worth noting that Swartz (in K. Vetensk. Acad. Handl. 

 44, 1. 1, fig. 2, 1789) describes his Spergula sagino'ides as possessing 

 only five stamens. Smith draws attention to this statement — 

 exemplified also in Swartz's figure — when describing his own 

 plant and figure (Eng. Bot. ed. 1, t. 2105), and adds that whether 

 his (Smith's) plant is Swartz's or not it is certainly Linne's. As 

 Presl cites Smith's figure when founding his Sagina linncBi, we 

 have, in this remark of Smith's, the origin of Presl's trivial name. 



In all the specimens of Sagina sagino'ides which I have observed, 

 including both the forms here discussed, the stamens have been 

 n + n, where n is four or five ; and Presl correctly gives the number 

 of the stamens of the species as eight or ten. I do not doubt that 

 Presl deliberately included both forms of the species in his S. linncei, 

 for tetramerous flowers in the larger form are quite rare. It is 

 also fair to say that Smith also included both forms in his Spergula 

 sagino'ides, for both forms are so named in his herbarium. 



From the point of view, then, adopted in the present paper, 

 the following citations are set out : — 



Sagina saginoides Dalla Torre Anleit. Beob. Alpenpfl. 75, in 

 Hartinger's Atlas der Alpenfl. (1882) incl. Sagina macrocarpa ; 

 Britton in Mem. Torr. Club. v. 151 (1894) ; Spergida sagino'ides 

 L. Sp. PI. 441 (1753) ! ; Smith Fl. Brit. 504 (1800) ! ; Sagina linnai 

 C. B. Presl Eel. Haenk. ii. 14 (1831) ; Sagina saxatilis Wimmer 

 Fl. Schles. 75 (1841). 



(a) S. SAGiNOiDES var. macrocarpa Beck Fl. Nied.-Ost. 358 

 (1890) ; Spergella macrocarpa Eeichenbach Icon, v., 26, fig. 49636, 

 (1841) ; Sagina macrocarpa Maly Enum. PI. Austr. 293 (1848) ; 

 Sagina saxatilis var. macrocarpa Hausmann Fl. Tirol. 133 (1854). 



Icones : — Eng. Bot. ed. 1, t. 2105, as Spergula sagino'ides ; Fl. 

 Dan. t. 1577, as Spergula sagino'ides ; Svensk Bot. t. 765, as 

 Spergida sagino'ides ; Eeichenbach Icon. v. t. 202, fig. 49636, as 

 Spergella macrocarpa. 



Exsiccata : — Billot, 1423 (partim), as Sagina linnai; Fellman, 

 42, as Arenaria hiflora (corrected to ;S'. saxatilis) ; Fries, ix. 40, as 



5. saxatilis. 



(b) S. SAGINOIDES var. TYPiCA Beck loc. cit. ; Spergella sagi- 

 no'ides Eeichenbach loc. cit. t. 4962 ; x Sagina normanniana 



