ERICACEAE. 39 



back than in E. eu-Tetralix, so that their shape is ovate-ohlong, gla- 

 brous above and on the midribs. Branches and pedicels puberulent 

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

 Heaths between Roundstone 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 uj) 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, 



HYBKID. 



ERICA TETRALICI-CILIARIS. 



Plate DCCCLXXXVIII. 



Erica Watsoni, Benth. D. C. Prod. Vol. VII. p. Q^5. 



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-tipj)ed 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 Eoundry at Perran to the plantation, in 

 which E. ciliaris grows so abundantly." 



