134 
HISTOLOGIE COMPARÉE DES ÉBÉNACÉES 
natis V. breviter acuminatis, obtusis, basi cuneatis, subglabris (?), 
coriaceis, petiolatis, nervis tenuibus, crebris (Sec. Hiern). 
Folia. — Epidermidis superæ cellulæ recticurve delineatæ, 13 |x 
altæ, subcollenchymatosæ. Epidermidis inferæ cellulæ recticurve 
delinatæ, Gjjt-altæ; cuticulæ crassæ et leves. Pili omnes simpli- 
ces, unicellulati subtus, supra rari. Stomata ovata, 33 jx longa, 
cellulas epidermidis superficie multo majora, ad æquilibrium epi- 
dermidis aperientia. Mesophyllum bifaciale, 8-10 seriatum, circit. 
306 crassum. Cellulæ paliformes 1-2 ordinatim dispositæ, 4-5-plo 
longiores quam latidres, fere l/o-i/4 mesophyllum implentes. 
Nervorum lateralium nervique medii fasciculi non immersi, 
vagina fibrosa continua inclusi. Petioli fasciculi (4?); principuus 
fasciculus concentricus, vagina fibrosa continua inclusus. Crystalla 
illiiminatoria in parenchymate paliformi ( ?) Crystalla echinata v. 
clinorhombica in mesophyllo, in nervorum petiolique parenchy- 
mate. 
Caulis. — Periderma subepidermide. Yagina sclerenchymatosa, 
e pericyclo orta. Crystalla simplicia in parenchymate. Yasa cum 
punctatione areolata et cum diaphragmate foramine ovato perfo- 
rato. 
