ERICACEiE. 39 



back than in E. cu-Tctralix, so that their shape is ovate-oblong, gla- 

 brous above and on the midribs. Branches and pedicels puberulent 

 or sub-glabrous. Calyx-segments and capsule glabrous. 

 Heaths between ltoundstone and Clifden, Galway. 



Ireland. Shrub. Late Summer and Autumn. 



Stem rarely above 1 foot high, much branched above ; the leaves 

 on the flowering-shoots disposed in the same way as those on the 

 barren branches, and extending up to the flower-heads, apparently 

 always glabrous above and on the midrib beneath, generally consider- 

 ably broader in proportion to their length than those of E. eu-Tetra- 

 lix (from the margins being less rolled back), and with the hairs with 

 which the margin is ciliated longer and further apart ; calyx-seg- 

 ments generally broader : though I have seen specimens of E. eu- 

 Tetralix in which they are fully as broad, but in E. Mackaiana 

 they are always glabrous, with the exception of a little horseshoe- 

 shaped patch of scales, similar to those on the under side of the 

 leaves ; Corolla shorter and wider. Capsule glabrous, which it 

 appears never to be in E. eu-Tetralix. 



Mackay's Heath. 



HYBRID. 



ERICA TETRALICI-CILIARIS. 



Plate DCCCLXXXVIII. 

 Erica Watsoni, Benth. D. C. Prod. Vol. VII. p. 665. 



Intermediate between Erica ciliaris and E. Tetralix, with a 

 series of forms passing almost imperceptibly into each. Distin- 

 guished from E. ciliaris by the irregular branching and more 

 procumbent habit, by its narrower leaves, sub-capitate flowers, 

 and shortly - awned anthers ; from E. Tetralix, by the leaves 

 being ciliated with much longer gland-tipped hairs, the corolla 

 larger, more ventricose and arched, and with the mouth slightly 

 oblique. 



This plant was first found on a heath near Truro by Mr. H. C. 

 Watson, and afterwards by Mr. Borrer "on the right hand of the 

 lane which leads from the Foundry at Penan to the plantation, in 

 which E. ciliaris grows so abundantly." 



