A GRAIN OF BARLEY. Tig 
= Fig. 3.-—Transverse section through Barley grain. 
m. Remnant of nucleus (cf. Plate III., Fig. 8, ph), £p. Section of 
‘* pigment string ” (funiculus). Others parts lettered as in Fig. 2. 
Fig. 4.—One of the two lodicules. 
Fig. 5.—Sketch of longitudinal section through ovary of Barley at time of 
fertilization. 
s. Style. td. Conducting tissue for pollen-tubes. . Nucleus of 
ovule. 2.2. Inner integument of ovule. z.e. Outer integument 
of ovule. ¢.s. Embryo-sac. 
PuLaTE II. 
Fig. 6—Longitudinal section through lower part of a grain of ripe Barley. 
scut, Scutellum. ad, ef. Absorptive epithelium of scutellum, 
Embryo. \ Cotyledon. plum. Plumula. vad. Radicle. r. cap. Root- 
cap. 75h. Root-sheath. 
s.c. Starch-containing cells of endosperm. c.c. Emptied and compressed 
cells of endosperm. a./, Aleurone cells of endosperm. ef. nucell. 
Remains of epidermis of nucleus. 7. Testa, developed from outer integ- 
developed from walls of ovary. .7. Inferior palea. ,s. Superior palea, 
6.4. Part of basal hair. ff. Funiculus, the common line of origin of 
testa and pericarp. 
Pate III. 
_ Fig. 7.—Longitudinal section through ovary of Barley. 
s.t. Lower end of one of the three stamens. .c. Outer part of walls of 
ovary. 0.2. Inner chlorophyll layer of walls of ovary. e. Epithelium 
lining ovarian cavity. 7z.e. Outer integument. 2.7. Inner integument of 
ovule. ¢.#. Epidermis of nucleus. end, Micropyle.  muce//. Nucleus. 
s.c. Embryo-sac. v. Oosphere and Synergides. a. Antipodal cells. 
ig. 8.—Transverse section through ovary of Barley. 
fj. 1,f. 2, Vascular bundles. ¢/. Cells, which in the ripe grain are coloured 
brownish-yellow— pigment string” or funiculus. f/%. Cells of the 
nucleus which can still be recognized in the ripe grain (cf. Plate I., Fig. 
3, 2). Other letters same as in Fig. 7. 
Fig. 9.—Stigma and stigmatic hairs of flower of Barley. 
PLaTE IV. 
1 fig. 1o.—Longitudinal section through embryo of Barley. 
Fig. 11.—Longitudinal section through integuments of Barley-grain highly 
magnified—shows also aleurone and starch-containing cells of endosperm. 
; PLATE V. 
Fig. 12,—Tangential section through aleurone cells of Barley—shows granular 
contents. 
Fig. 13.—Longitudinal section through integuments of Wheat-grain. 
ument of the ovule (cf. Plate III., Figs. 7 and 8, ze.) . Pericarp, 
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