Feb. 1891.] BOTANICAL SOCIETY OF EDINBURGH. 63 



are minute serrations, each developing a short hair, which 

 1 regard as the undoubted rudiment of the glandular cilia. 



On transverse section (fig. 3) we find that the outline of 

 the leaf is intermediate between that of E. Tdralix and of 

 E. Mackayi ; but the hairs round the stomata are equal in 

 length to those of the latter, as if this were correlated in 

 both with flatter leaf-surface, as compared with E. Tdralix. 



But the floral parts exhibit special divergence from the 

 others. The sepals are oval spathulate, and bear 7-9 long 

 cilia devoid of gland-tips. The corolla is tubular, the free 

 tips of the petals are expanded or reflexed, and the veins 

 strongly marked, so that the blossom moi-e resembles some 

 of the Cape Heaths or Epacrids. The anthers have tails 

 nearly or quite as long as in E. Tdralix or E. Mackayi. The 

 ovary shows a flat or depressed apex and is glabrous, or 

 has minute hairs over the top ; the style is strongly exserted, 

 and the stigma is flat or slightly rounded. The stigmatic 

 hairs are much shorter than in its allies. I must therefore 

 conclude that this is a very pronounced type of divergence 

 from E. Tdralix, though the points of divergence do not lead 

 to any other British form. 



I may therefore be permitted to propose that it be named 

 Erica Tdralix, sub-species Shmrti, as a small tribute to the 

 enthusiasm and botanical discrimination of our Fellow, 

 Dr Stuart. 



But there is cultivated in gardens a form the exact origin 

 of which I cannot trace, but which is named E. Tdralix var. 

 Laivsoniana. Now, in every point of structure it is quite 

 intermediate between E. Mackayi and E. Stuarti, the leaves 

 as well as the sepals having non-glandular cilia. The corolla 

 is tubular-urceolate, the anthers are tailed, the ovary is 

 spherical or slightly depressed at the apex, and the style is 

 strongly exserted. 



Accepting the usual systematic character of E. Tdralix, we 

 thus obtain four sub-species : — 



Sub-species 1. — Tdralix proper ; leaves strongly revolute, 

 liairy above, glandular-ciliate, stomatic hairs minute ; sepals 

 oblong lanceolate glandular-ciliate ; corolla ovoid urceolate ; 

 ovary spherical, hairy, and with glandular cilia; style 

 slightly exserted. 



Sub-species 2. — Mackayi, Hook ; leaves nearly flat, glab- 



