. The classification of flowering plants. Plants. 492 FLOWERING PLANTS America; many grow at considerable altitudes on the western mountain ranges. Species of Phlox, Gilia, Polemonium, Cobaea scandens and others are favourite garden plants. Polemoniaceae shew some resemblance to Convolvulaceae, with which they agree in general plan of floral structure. They differ in the gamosepalous calyx, the simpler aestivation of the corolla, the typically trimerous pistil, and the varying number of seeds; also in the absence of Fig. 227. A-E. Polemoniaceae. A. Floral diagram of Polemonium coeruleu
. The classification of flowering plants. Plants. 492 FLOWERING PLANTS America; many grow at considerable altitudes on the western mountain ranges. Species of Phlox, Gilia, Polemonium, Cobaea scandens and others are favourite garden plants. Polemoniaceae shew some resemblance to Convolvulaceae, with which they agree in general plan of floral structure. They differ in the gamosepalous calyx, the simpler aestivation of the corolla, the typically trimerous pistil, and the varying number of seeds; also in the absence of Fig. 227. A-E. Polemoniaceae. A. Floral diagram of Polemonium coeruleum; d, disc. B, Median longitudinal section shewing ovary, disc (d) and base of sepals (s). C. Upper portion of corolla of Gilia androsacea shewing contorted aestivation, D. Flower of G. Brandegei cut vertically, with subtending bract h. E. Cross-section of fruit of G. capitata shewing loculicidal dehiscence. F, G. Hydrophyllaceae. F. Cyme of Phacelia integrifolia. G. Ovary of P. Whitlavia cut across. B-E and G enlarged. (A after Eichler; B after Engler; C-E after Peter; F, G after Brand.) Suborder 2. Boraginineae. Flowers generally regular in unilateral cymes. Carpels two; ovules oo to two in each carpel, anatropous with upwardly directed micropyle. Fruit a capsule or drupe or splitting into four one-seeded mericarps. Family II. HYDROPHYLLACEAE Flowers bisexual, regular, generally pentamerous with reduction to two in the pistil. Sepals united at the base, aestivation imbricate. Corolla rotate, bell- or funnel-shaped, aestivation imbricate, seldom contorted. Stamens epipetalous, generally. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Rendle, A. B. (Alfred Barton), 1865-1938. Cambridge, University press
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectplants, bookyear1904
