PL. CLXXXIX. 



SPATHIPHYLLUM HELICONIAEF. ILIUM 



NAT. OKD. AROIDI- 

 ETYMOLOGY : from the Greek <m a Q v , spathe, and ^A/o-,, l eaf iu . x]] 

 GENERIC CHARACTER : spatha foliaris, persistena. ^ 



r>« pfiita-octopliyllum. Stamina 5-8, perigonii foliolis opposit: 



re. Ovula in loculis gemina, collateralia, axi appensa. St; 



- Herbae 



trojneae, amides, fol 



n< ,tkiihil'»- ■ 'ibus. (Endl. Gen. 1703.) 



Spatlaiphyllum, Schott, Melet. 22. 



SPECIFIC CHARACTER : lamina folii oblonga apice brcviter acuminata 

 tissimis leviter adscendentibus, remotiusculis, secundariis costae parum dm •• 

 in pedunculum contracta ibique spatio marginis angustissimi erigpatj id \mt 

 culum producta; spadicem digitiformem duplo superante, rhachi .1-1 muian 

 semipollicari, ovariis longe et acutate prominentibus. Spadix Bomm *$h frm 

 hexasepalum, sepala spathulato-cucullata, 3 exteriora interiora lateralitor obtoi 

 omnia conglutinata v. leviter connexa. Stamina brevia, filamenta rnmprfuli 

 ticae, effetae loculorum marginibus retroflexis sagittatae, ovariis adgfatfeal ie M 

 ultra sepala elata. Ovaria sepalis duplo longiora ad medium usque obconoidw 

 loculamentis altitudine sepalorum, ovulis 6 in quolibet loculamento. medio ;t xi 

 spectante. Stigma discoideum 3-4 lobatum. Baccae ovoideae apice in cornu at 

 minosa. Testa crassiuscula. Embryo axilis. (Schott, Aroideae, p. 2, t. 5. 6.) 

 urbem Moyobambam. — 1865. — Ad vir. descr. in h. Lind. — E. A. 



Spatiptiyllum lreliconiaefoliu.m, Schott , Avoid. , p. 2. 



This beautiful Aroid grows on the banks of the Rio- 

 Huallaga (Peru), near Moyobamba, whence Mr. Linden 

 obtained living plants in 1865. 



We took it at first to be a new species , but it approaches 

 so near the S. /<.■/■<■■■ .,;<>, /.,//,.,„, described and figured by 

 Schott, that we feel justified in referring it to that species. 



We have here completed the description given by Schott, 

 to whom its native country was unknown. 



The other known species of Spathiphyllum are from Bra- 



zil . Vein 7.H 



WINTER DISCOLOURING OF EVERGREENS. 



The change in colour to red or brown which many ever- 

 green trees and shrubs undergo in winter has been the 

 subject of investigation of several botanists. Von Mohl 

 determined that this colour did not exclude the presence of 

 chlorophyll, but appeared with it in the form of brown or 

 yellow granules in the juice of the cellular tissue. His 

 experiments were repeated by Mr. G. Kraus, who published 

 the results some time ago («). He observed that in Buams 

 arborescens the exposed parts of the leaves assumed a brown 

 colour, especially on the upper surface, with the exception 

 of the folds. The palisade cells contain small granular masses 

 of protoplasm, coloured red-brown or copper-red, and are 

 destitute of chlorophyll. In the underlying layer of cells 

 protoplasm is found of a yellowish or brownish green inter- 



mixed with half destr 

 is also discoloured. In 

 nules are intact and 

 takes a green hue. This 

 particularly noticeable 

 These phenomena indii 

 the cell. The process 

 weather, and the grain: 

 has already shown that 

 most exposed to the in 

 may also take place : 



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