466 Mr. Ch. C. Babington on the Robertsonian Saxifrages. 



Duchartre's Tl. Pyreneenne/ is precisely similar to the above. 

 This form is my S. umbrosa a. crenata. 



Plate IV. fig, 4. (the var. a. of Mackay, from his cultivated 

 Irish specimens,) is considered by my friend Mr. J. T. Mackay 

 as the typical form of the species, and, " identical with the London 

 Pride of the gardens " and the Pyrenean plant, has the margin 

 crenate-serrate. A specimen, fig. 2 (" S. umbrosa, L. Hab. in 

 montibus prsesertim altissim. copiose. — Penaflor,\\ivA.. — Pico 

 de Arvas, 14 Aug." " Durieu PI. Selectse Hispano-Lusitanicee. 

 Sec. 1. Asturise. Anno 1835 collectse." No, 330.), is the same va- 

 riety found in the north of Spain. They are denominated by me 

 var. /S. crenato-serrata. 



Plate IV. fig. 5. is the var. yS, of Mackay, var. 7. punctata, 

 Bab., and Sax. punctata of Haworth and Reichenbach. Gathered 

 at Killarney, Ireland, in 1841. 



Plate IV. fig. 6 and 7. represent Mackay's var. 7. serraiifolia, 

 my var. 8. serraiifolia, and the Sax. serraiifolia of Mackay (for- 

 merly) and Reichenbach. 



Saxifraga Geum. 



Plate IV. fig. 8. is the plant of the Pyrenees ; it is taken from 

 a specimen marked " S. Geum, L. Au Pas de Roland prope It- 

 satou. Pyr. occid. 1831." Endress. Here the leaves are crenate, 

 or even occasionally have the crenatures so much flattened as to 

 become almost retuse. I believe that nothing like this has been 

 seen wild in Ireland. 



Plate IV. fig. 9. is the Irish Sax. Geum from Connor Hill near 

 Dingle, county Kerry, 1841 ; and fig. 10 is a plant with remark- 

 able leaves from Turk Waterfall near Killarney. Here the leaves 

 are crenate-dentate (fig. 9), or dentate (fig. 10), thus presenting 

 the same difference from the Pyrenean plant which was seen in 

 Sax. umbrosa. 



Saxifraga hirsuta. 



Plate IV. fig. 11. with a crenate margin, and fig. 13 and 13 

 with a dentate margin, represent the corresponding forms of Sax. 

 hirsuia. The first (fig. 11) is from the " Pyi-enees," and was ob- 

 tained from the herbarium of Dr. Leo of Metz : the others are 

 Irish. Pig. 12 from the Gap of Dunloe, Killarney, 1841, the ori- 

 ginal Irish station. Fig. 13 from Connor Hill, county Kerry, 

 1841. 



March 5, 1844, St. John's College, Cambridge. 



