. Beihefte zum botanischen Centralblatt. Plants. Wernham, The Systematic Aiiatomy ol' the geiius Cnnejjhora. 463 The parenchyma is genorally ratber thick-walled. The pali- sade tissue consists of about three laycrs, the upper of cells elon- g-ated perpendicularly to the surface, the lower of one to two layers of closely packed square cells. Tannin is especially abundant in the palisade tissue. The "spong-y" parenchyma coinprises rather large cells, which appear flattened parallel to the surface. Tannin occurs in this reg-ion, but not so abundantly as in the ventral portion of the lea
. Beihefte zum botanischen Centralblatt. Plants. Wernham, The Systematic Aiiatomy ol' the geiius Cnnejjhora. 463 The parenchyma is genorally ratber thick-walled. The pali- sade tissue consists of about three laycrs, the upper of cells elon- g-ated perpendicularly to the surface, the lower of one to two layers of closely packed square cells. Tannin is especially abundant in the palisade tissue. The "spong-y" parenchyma coinprises rather large cells, which appear flattened parallel to the surface. Tannin occurs in this reg-ion, but not so abundantly as in the ventral portion of the leaf. Calcium Oxalate occurs chiefly in the upper layers of the spongy tissue; it takes the form principally of small aggregations of crystal-sand, but a few minute cluster-crystals are to be seen. The upper epiderrais is of rather large thick-walled brick-like cells with extremely thick cuticle, the inner surface of which is corrugated into irregulär folds. There appear to be no stomata upon the ventral surface. The lower epidermis diff'ers from the upper in consisting- of smaller, flatter cells, with cuticle less strongly developed. A few stomata are visible. The guard-cells are relatively large and are not at all sunk; each is associated with a spheroidal. Fig. 7 Canephora madagascariensis. Diagramm of transverse section taken near the middle of the inflorescence peduncle. F. s. fibrous sheath; f. b. fibrous Strands; other signs as in Fig. 3. auxiliary cell with rather strongly lignified w^alls. The stomata, we shall find, are characteristic for each of the three species under description. III. Peduncle. The shape of the transverse section, shown m Fig. 7, offers a certain Suggestion of dorsiventrality, although the Organ in question presents its edge to the mother axis, atleast so far as can be judged from the dried and pressed material; one surface of the swollen central portion is comparatively even, and the other folded and irregulär. This Suggestion, we shall see, is bor
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