. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. PRIMULACEAE 71 P. elatior x P. officinalis: 31-6 % good, 69-63 % shrivelled and useless. P. elatior (average of flowers from Schonen): 33 % normal, 67 % shrivelled and useless. P. elatiorXP. per-officinalis (from Schonen): 45% normal, the rest shrivelled and useless. P. vulgaris X P. elatior: 66-9 % normal. P. vulgaris (per-acaulis) x P. elatior: 78 % normal. These results appear to be confirmed by the number of seeds developed in the different Fig.
. Handbook of flower pollination : based upon Hermann Mu?ller's work 'The fertilisation of flowers by insects' . Fertilization of plants. PRIMULACEAE 71 P. elatior x P. officinalis: 31-6 % good, 69-63 % shrivelled and useless. P. elatior (average of flowers from Schonen): 33 % normal, 67 % shrivelled and useless. P. elatiorXP. per-officinalis (from Schonen): 45% normal, the rest shrivelled and useless. P. vulgaris X P. elatior: 66-9 % normal. P. vulgaris (per-acaulis) x P. elatior: 78 % normal. These results appear to be confirmed by the number of seeds developed in the different Fig. 242. Primula integrifoUa, L. (after Herm. Milller). A^ B. Short- and long-styled plants (natural size). C, D. Short- and lonp-styled flowers, partly dissected (natural size), E. Stigmatic papillae of the short-styled, F^ G, do. of the long-styled flowers. H^ J. Stigmas of the short- and long- styled flowers (X 7). K, L. Moistened pollen-grains of short, and long-styled flowers. 1816. P. integrifolia L. (Herm. Miiller, ' Alpenblumen,' pp. 350-62.)— This species bears dimorphous heterostylous butterfly flowers. The tube of the purple-red corolla is 10-14 ^^- long, and as a rule is of noticeably greater length in the short-styled form, where also the limb of the corolla is broader. {C/. Fig. 242.) Visitors.—The following were recorded by the observers, and for the localities stated.— Herm. Miiller (Alps), 7 Lepidoptera, a Bombyliid, and a beetle. Redtenbacher (Austria), the Staphylinid beetle Anthobium robustum Heer. 1817. P. villosa Jacq. (?) (Herm. Miiller, ' Alpenblumen,' pp. 362-3.)—This species bears dimorphous heterostylous butterfly flowers. According to Pax (Bot. Jahrb., Leipzig, x, 1888, p. 227), the species described by Hermann Miiller as. 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 Knuth,
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