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112 



MR. y. E. "nRO^VN : NEW AND OLD 



connate leaves above ilcscribod (under Af. pisiformc) ; which, after an interval 

 of a month or two, protrude from their common centres, the secondary 

 pairs of long proper leaves ; the <laily inci'easing sizes of which, soon hurst 

 asunder the sheathing bases of the foliage o£ the preceding year ; and in a 



great measure push them ofif." 



Haworth places under this section two species ouly^— J/. j(>f5?71>r??i^, Haw. 



nnfy Thunb, The former is quite unknown to me, but 



and 



m 





was in cultivation at Kew^ Garden 



s many years ago; 



unfortunately, I nuido only a small and yovy crude sketch of it witfiout 

 taking any note?, so am una hie (o say if Haworth's stattMuent of its mode of 

 growth 19 quite accurate^ but as J/. cUvoruni^ N. E. Br, and il/. cog-natum^ 

 N. Fa Br. described below seem t ) me to belong to tlie same group as 

 M. monih'fornic (compare for instance the short beaded brancli of 

 M. rlivorunu 1^'* 5. Hg. 6, with the stem of J A monlUforme represented on 



) 



develop- 



ment of the tw^o kinds of leaves will be the sam(^ in 71/, fiwniJifornie as it is 

 in ilA clivorunt^ M.^cognaLum^ M. proxiuunn^ and J/, disdtunt described below, 

 whicli takes place as follows : — During the sunimer the free tips of the i)air 

 of leaves that are united for a considerable or the greater pari of their 

 length into a cylindric or conical body terminating each branch gradually 

 wither and dry up, and the skin of the united part also withers and becomes 

 greyish, that part then assnming a more or less dried-up or dead a])pcarance 



(really a resting condition), so that the }ilant a[)pears leafless- Within this 

 dead-looking terminal body, howev<M', althougli 



recurving leaves 



h quite invisible to any 

 observer^ a fresh growth is slowdy developing, its formation taking place at 

 the expense of the substance of the body enclosing it, so that finally it 

 entirely replaces the latter, only the dried-up skin renuiining and enveloping 

 the new formation. Between October and Februar}' the dried skin ruptures 

 and the new growth emerges from it, consisting of one pair of spreadino^ or 



that are free except at tlie very base, and (or shortly 

 followed by) another pair that are united for a considerable part of their 

 length or nearly to their tips into a cylindric or coni(*al body formino- the 

 termination of the stem or brancli bearing it. Both pairs of leaves are 

 minutely crystalline-papillate when young and remain green for some time, 

 then they wither and the same process of renewal, as above described, takes 

 place in due season. 



From this it will be seen that if Haworth's statement of the sequence of 

 development of the two pairs of leaves annually produced by J/, moniiiforme 

 is correct, then in that species their order of production is exactly the 

 reverse of that which occurs in J/. cUroruut and allies, which I place in the 



'7 



in appearance. 



