Feb. 1, 1925 
Vegetative Organs of Sugar Cane 
221 
and the outside of the bundle, where it 
forms typical caps. In the peripheral 
internodal bundles the sheath increases 
greatly but mostly on the xylem pole, 
whereas in the nodal bundles the 
sclerenchyma caps on the phloem pole 
are most conspicuous. In the bundles 
of the leaf blade the cells of the 
sclerenchyma sheath become larger, 
more regular, and contain large chlo- 
roplasts. In addition, the leaf bundles 
possess a fibrous sheath located be¬ 
tween the chlorophyll-bearing sheath 
and the phloem. The extent of this 
fibrous sheath is in direct relation to 
the size of the bundle. 
The epidermis of the stem and of the 
lateral organs is made up of two types 
of cells—long cells with strongly undu¬ 
lated walls and short silicified cells. 
The inner epidermis of the leaf sheath 
and the ligule, however, consists only 
of long cells. The epidermis of the 
mature stem is strongly lignified and 
covered with a layer of wax. The sub- 
epidermal cells also become lignified, 
but thin-walled parenchyma cells are 
interpolated at intervals. The epi¬ 
dermis of the leaf sheath and the blade 
bears hairs and stomates of a type 
common to grasses. 
The vascular tissue of the root 
forms a siphono stele bounded exter¬ 
nally by a cortex, internally by a pith. 
The peripheral cortical cells are suber- 
ized, forming a well-marked exodermis. 
Between the pith and the vascular 
cylinder is a sclerenchymatous layer 
which becomes lignified very early, 
and affords support to the young and 
delicate vascular tissue of the root. 
The xylem plates of the root are sep¬ 
arated from the endodermis by a single¬ 
layered pericycle, though in small, lat¬ 
eral rootlets a xylem cell may border 
directly on the endodermis. 
LITERATURE CITED 
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1889. over suikerriet TJiT “zaad”. Meded. 
Proefsta. “Midden-Java” Semararan. [Not 
seen. Reprint (?) in Archief Java-Suikerindus. 
1893 (Bijlage): 159-170, illus.] 
(2) Bremekamp, C. E. B. 
1914. HET VAATBUNDELSTELSEL bij het suiker- 
riet. Archief Suikerindus. Nederland .-Indie 
22: 499-508, illus. 
(3) Bremekamp, C. E. B. 
1914. DE ANATOMISCHE BOUW VAN DE WORTEL- 
schors bij het suikerriet. Archie? Suiker¬ 
indus. Nederland.-Indie 22: 508-514, illus. 
(4) Dickhoff, W. C. 
1912. BIJDRAGE TOT DE KENNIS VAN DEN ANATO- 
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(5) Duval-Jouve, J. 
1875. HISTOTAXIE DBS FEUILLES DE GRAMINfcES. 
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(6) Geerts, J. M. 
1916. PLANTKUNDE VAN HET SUIKERRIET. 151 p., 
illus. Weltevreden. 
(7) Haberlandt, G. F. J. 
1904. PHYSIOLOGISCHE PFLANZENANATOMIE. Aufl. 
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(8) Kamerling, Z. 
1902. OVER HET INSCHEUREN VAN DE RIETBLA- 
deren aan de bladbasis. Archief Java- 
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(9) Klinge, J. C. 
1879. VERGLEICHENDE HISTOLOGISCHE UNTER- 
SUCHUNG DER GRAMINEEN-UND CYPERACEEN- 
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(10) Kobus, J. D. 
1889-92. BIJDRAGEN TOT DE KENNIS VAN DEN 
BOUW EN DE ONTWIKKELING VAN HET SUIKER¬ 
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1899. DAS ZUCKERROHR UND SEINE KULTUR MIT 
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(13) Mohl, H. von. 
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