RUBIACE^ 263 



branches, which are often elongate and simple. As has been 

 remarked, the habit is more like that of M, laevigata. It is also a 

 larger plant than the type, and the colour is olive-green, frequently 

 becoming yellowish green when dry, and occasionally shining. 

 The steins have a border of 2-4 greatly thickened reddish cells, 

 while the type has only the outermost row somewhat thickened, 

 with the second row less so. Herr C. Miiller, who has drawn 

 attention to this character in Beihefte z. Bot. Cent r alb. p. 103, 1902, 

 appears to reverse the two plants in regard to this condition. It 

 varies considerably, doubtless in accordance with the wetness of 

 the locality. M. rivularis varies so much that some of its forms 

 are difficult to place. I give the localities of the specimens in my 

 herbarium which I should consider to be the var. simplicior. That 

 it is an advantage to have the variety distinguished may be allowed 

 from the fact that it is frequently queried or mistaken in this 

 country for some other species of the genus : — Lanark : Falls of 

 Clyde, January, 1902, P. Ewing. Mid Perth: Finlarig Wood, 

 Killin, July, 1900, P. Erring; Culdees Castle, September 27, 1901, 

 W. Evans; Falls of Ness, near Muthil, September 30, 1901, 

 W. Evans; Buchanty, c. fr., November 5, 1903, R. H. Meld rum, 

 Ireland— Down : Magheralin, April, 1897, C. H. Waddell. An- 

 trim : Drumragmond Wood, Toone, July 4, 1899, H. W. Lett. 

 Monaghan : Castleshane, July, 1900, C. H. Waddell. 



M. rivularis Nees var. fjeroensis C. Jensen in Bot. of the 

 Faroes, Part i., Bryophyta, p. 124, 1901. "Tufts dense, opaque, 

 deep green or partly brownish green ; plant 2-3 centim. long, 

 gracile, irregularly pinnate, dense-leaved, branches obtuse ; auricles 

 half as broad as the stipules, decurrent, obtuse or acute, one or 

 both margins recurved entire ; leaf-cells with thin walls and distinct 

 trigones at the angles, the interior filled with chlorophyll, upper 

 cells O'0 13-0*020 millim. broad, smaller than in the typical form, 

 where they are 0-020-O032 millim." (C. Jens., loc. cit.). A plant 

 found by Mr. Symington Grieve on " rocky banks, shores of Sand- 

 water Loch, Bixter, Shetland, August 23, 1902," agrees with a 

 specimen of this variety from the Faroes, kindly given to me by 

 Herr Jensen. The compact, partly brown tufts are very different 

 from what one usually associates with this species, and unlike any 

 specimens which I have seen from the mainland. 



ALABASTRA DIVERSA.— Part XV. 

 By Spencer le M. Moore, B.Sc, F.L.S. 



(Continued from p. 233.) 



3. New and Rare Uganda Plants. 



I now resume the task of publishing an account of Dr. Bag- 

 shawe's Uganda Gamopetala. The localities of the plants to be 

 mentioned are largely those or near those of my last paper,* to 



* Journ. Bot. 1907, p. 41. 



