The origin and development of the compositæ.
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The variation in structure of styles and stamens is described and discussed in separate sections, while their functions in the pollen-presenting mechanism is considered partly in section D of the present chapter and partly in Chapter III which deals with the irritability of the mechanism.Abstract:
I the Compositas the mechanism involved in the presentation of pollen to the insect visitor includes both styles and stamens. These essential oi'gans ai-e discussed, therefore, in the present chapter, but for convenience the variation in structure of styles and stamens is described and discussed in separate sections, while their functions in the pollen-presenting mechanism is considered partly in section D of the present chapter and partly in Chapter III which deals with the irritability of the mechanism.read more
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Biological flora of the British Isles
TL;DR: A low\ glabrous\ evergreen shrub\ "4#Ð09Ð14Ð"39# cm tall[ the ~owering stems are decumbent to erect\ spar! ingly branched\ arising from a creeping\ woody rhi! zome].
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Outline of the classification of flowering plants (Magnoliophyta)
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The dispersal effectiveness of the achene-pappus units of selected Compositae in steady winds with convection
J. C. Sheldon,F. M. Burrows +1 more
TL;DR: It is shown that the efficiency of dispersal is determined more by the fine details of the pappu geometry, which directly affects its aerodynamic properties, than by the size ratio of pappus to achene.
Everywhere but Antarctica: using a supertree to understand the diversity and distribution of the Compositae.
Vicki A. Funk,Randall J. Bayer,Sterling C. Keeley,Raymund Chan,Linda E. Watson,Birgit Gemeinholzer,Edward E. Schilling,Jose L. Panero,Bruce G. Baldwin,N.T. Garc{ 'ıa-Jacas,Alfonso Susanna,Robert K. Jansen,I. Friis,H. Balslev +13 more
TL;DR: The results of molecular phylogenetic studies of members of tribes Helenieae, Heliantheae, and Eupatorieae (Asteraceae) and General systematics and proposed taxonomic changes in current classification are presented.
References
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Mutation En masse
TL;DR: Two different species have been discovered of which certain strains give rise by mutation to large numbers of dwarfs, in both cases the dwarfs occur in far greater numbers than experience would lead one to expect, even in the most actively mutant strain.
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Development of the Flower and Embryo-Sac in Aster and Solidago
TL;DR: Let us now turn to the development of the ovule and the embryo-sac; there appears at the bottom of the ovarian cavity a rounded excrescence; this is the incipient ovule, the promise of a future seed.
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Mass Mutation in Oenothera pratincola
TL;DR: Of the several small-flowered wild evening primroses thus far examined by the writer for mutability, no other has yielded as valuable data as Oenothera pratincola, which shows the phenomenon which the writer has elsewhere designated as mutation en masse.