. Morphology of spermatophytes. [Part I. Gymnosperms]. Gymnosperms; Plant morphology. CONIPERALES 73 a similar monstrosity has been reported by Shaw ^* in con- nection with the cones of Sequoia. For some, such illus- trations settle the sporophyll character of the bract, which to them therefore becomes the carpel in the ovuliferous cone (Figs. 59, 60). In 1860 also Caspary ^ confirmed Braun's conclusion, citing abnormal specimens in which branches occurred in the axils of the bracts, and bearing the two halves of the ovuliferous scale as lat- eral appendages. In 1864 Parlatore " recorded
. Morphology of spermatophytes. [Part I. Gymnosperms]. Gymnosperms; Plant morphology. CONIPERALES 73 a similar monstrosity has been reported by Shaw ^* in con- nection with the cones of Sequoia. For some, such illus- trations settle the sporophyll character of the bract, which to them therefore becomes the carpel in the ovuliferous cone (Figs. 59, 60). In 1860 also Caspary ^ confirmed Braun's conclusion, citing abnormal specimens in which branches occurred in the axils of the bracts, and bearing the two halves of the ovuliferous scale as lat- eral appendages. In 1864 Parlatore " recorded a monstrous cone of Pinus Pinaster (P. Lemoniana) in which an ordinary spur shoot with its two needle leaves sprang from the axil of every alternate bract, re- placing an ovuliferous scale. His conclusions naturally accorded with those of Braun. In the same year (1864) Oersted i" re- corded some remarkable cones, in which the low- est bracts had the form of foliage leaves; in the axils of the next higher ones were several scales as on a suppressed axis, the two outermost being largest and opposite; higher up the bracts became gradually smaller and the axillary scales less numerous, but the two outermost scales grad- ually increased in size and became connate by their posterior margins, while rudimentary ovules appeared at their base; in the uppermost part of the cone the bract was reduced to its ordi- nary size, and the ovuliferous scales had fused into a single large broad structure dentate or bifid at the apex. His conclusion in general was that of Braun, but in his detailed application he. Fig. 58.—Podocarpus spp.: staminate and ovulate branches from P. Totara ; a, miorosporophjll; J, ovulate structures; c, longitudinal section of same ; d, ovulate structures from P. macropliyl- la; «, longitudinal section of same.—Branches and Or-c after Hookeb ; whole plate from Eng- LEE and Pkantl's Nat. Please note that these images are extracted from scanned page
Size: 1404px × 1779px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcoulterj, bookcentury1900, bookdecade1900, bookyear1901
