Trees; a handbook of forest-botany for the woodlands and the laboratory . Fig. 32. Leaflet of Ash, Fraxima excelsior, p. 154 (Ett). HORSE-CHESTNUT 157 (2) Leaves palmately compound, digitate, ex-stipulate. jEsculus Hippocastanum, L. Horse-chestnut (Fig. 33).Large tree with stout shoots, and large digitate leaveson a long petiole with broad insertions and prominent. Fig. 33. Horse-chestnut, Msculut Hippocastanum, p. 157 (D). pulvinus ; exstipulate. Leaflets 7 (or rarely 5), large, thin,6—12 cm. or more long (8—20 x 4—10 cm.), obovate- 158 HORSE-CHESTNUT lanceolate, or cuneate-obovate, tapering
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Trees; a handbook of forest-botany for the woodlands and the laboratory . Fig. 32. Leaflet of Ash, Fraxima excelsior, p. 154 (Ett). HORSE-CHESTNUT 157 (2) Leaves palmately compound, digitate, ex-stipulate. jEsculus Hippocastanum, L. Horse-chestnut (Fig. 33).Large tree with stout shoots, and large digitate leaveson a long petiole with broad insertions and prominent. Fig. 33. Horse-chestnut, Msculut Hippocastanum, p. 157 (D). pulvinus ; exstipulate. Leaflets 7 (or rarely 5), large, thin, 6—12 cm. or more long (8—20 x 4—10 cm.), obovate- 158 HORSE-CHESTNUT lanceolate, or cuneate-obovate, tapering below and sud-denly acuminate at the apex, unequally serrate, coarse;green above, paler below, at first woolly hairy, but eventu-ally glabrous. The central leaflet the largest, the lower-most the smallest. Leaves emerging early in spring, theleaflets at first erect, but soon deflexed on the rachis, somewhat like a half-closed umbrella: they turn yellowand brown and fall early in autumn, the leaflets disarticu-lating from the rachis (Fig. 4). Venation of leaflet conspicuously strict-pinnate, withpubescence in the axils of the veins. The secondariesnumerous, 12—20 or more pairs, strong, parallel andstraight to the margin and there ending in teeth, asdo a few branches from their outer sides. Tertiariesnumerous, forming incomplete cross-ties and a fine r