62 



Proceedings of the Royal Triith Aeadenty. 



i-eddish-brown ; axillary buds very slightly overlapped at the base by the 

 subtending pulvinus ; terminal buds surrounded with partly acute, partly 

 luueronate scales. 



(b) Ijcaws always covered with a glaucous bloom, as in />. feptolepis ; but 

 the two stomatic bands beneath are not so whit« as in that species. 



(c) Female ftotcfi-.-i, deep pink; in this respect exactly resembling 

 i. rvrojtaea : but the bracts are reflexed, being similar in this respect to 

 X. lejitolepis. 



(d) Cones, resembling in shape the European larch, being decide<\ly 

 conical, but not ?n dark in colour before ripening as that species ; scales 

 loosely appressed, upjier mai^in slightly letlexed, but not so much as in 

 L. leptnlrpii;, ba.<4al half of outer surface pubescent as in i. europaea ; bracts 

 muatly exserted, but the lips not projecting estemally so conspicuously as 

 in L. mrojxKa ; f»cduncle yellow, as in the last species. 



The distinctive characters, vi.sible to the unassisted eye, of tlie two species 

 and the hybrid, may lie tabulated as follows : — 





L. itnofmn. 



t. ItftolrpU. 



L. emolepi; 



T»ig»— 



gUbroii* 



pubcaeeot or glabrous 



glabrous or rery slightly 











liairy 





Tfllow 



n^d 





yellow 





nn wax 



nach vax 





fKglit wni 



Bud*— 



gnlden browTi 



red brown 





light reddish-brawn 





no redn 



nainona 





no rwin 





■Dales ■itmsd tarminai 

 bud roucronute 



■eales araimd terminal 

 bad mucronate and acute 



aralea around tenniniil bud 

 mucronate and acul« 



Pultini— 



ending at baie of axil- 

 larr bud 



overlapping 

 lary bud 



baw of axil- 



slightly orerlap|iing base 

 of axillary bud 



Bracis of yonng 

 eooet— 



pink 



siraight 



green ith 

 reflexed 





pink 

 reflexed 



Cone«- 



conical 



globo«( 





conical 





sr^ea straight or in- 

 eiirrcd 



scales much reflexed 



scales slightly reflexed 





bracK long, exacrted 



biacts abort. 



coDocaled 



bracU short, but a tew ex- 

 serted 





peduncle yellow 



pedunrle rc^ 



jdi!h 



pedunile yellow 



III. Kicroscopic characters of the parent species and of the hybrid. The 

 young twigs and the leaves, when cross-sections, obtained by the microtome, 

 are examine<l under a moderate power, show distinguishing characters : — 



(rt) Tiritjx, ill the fonn of the two resin-canals, which run longitudinally 

 through each pulvinus that gives rise to a leaf. 



(h) Leave*, in the number and form of the stomatic lines on both surfaces, 

 in the size and position of the two resin-canals, which are sometimes only 

 feebly developed, and are then said to l>e indistinct ; in the absence or 



