References

Bateman AJ (1951) The taxonomic discrimination of bees. Heredity 5:271-278 Campbell DR, Waser NM & Melendez-Ackerman EJ (1997) Analyzing pollinator-

mediated selection in a plant hybrid zone: hummingbird visitation patterns on three spatial scales. Am Nat 149:295-315 Carney SE, Hodges SA & Arnold ML (1996) Effects of differential pollen-tube growth on hybridization in the Louisiana irises. Evolution 50:1871-1878 Chittka L, Thomson JD & Waser NM (1999) Flower constancy, insect psychology, and plant evolution. Naturwiss 86:361-377 Cook LM & Soltis PS (1999) Mating systems of diploid and allotetraploid populations of Tragopogon (Asteraceae). I. Natural populations. Heredity 82:237-244

Cripps C & Rust RW (1989) Pollen foraging in a community of Osmia bees

(Hymenoptera: Megachilidae). Environ Entomol 18:582-589 Dieckmann U & Doebeli M (1999) On the origin of species by sympatric speciation. Nature 400:354-357

Dobzhansky T (1937) Genetics and the origin of species, 1st edn. Columbia University Press, New York

Dodd ME, Silvertown J & Chase MW (1999) Phylogenetic analysis of trait evolution and species diversity variation among angiosperm families. Evolution 53:732-744 Ellstrand NC, Whitkus R & Rieseberg LH (1996) Distribution of spontaneous plant hybrids. Proc Natl Acad Sci USA 93:5090-5093 Fulton M & Hodges SA (1999) Floral isolation between Aquilegia formosa and Aquilegia pubescens. Proc R Soc Lond B 266:2247-2252 Galen C, Zimmer KA & Newport ME (1987) Pollination in floral scent morphs of Polemonium viscosum: a mechanism for disruptive selection on flower size. Evolution 41:599-606 Gill FB (1988) Trapline foraging by hermit hummingbirds: competition for an undefended, renewable resource. Ecology 69:1933-1942 Giurfa M, Nüfiez J, Chittka L & Menzel R (1995) Colour preferences of flower-naive honeybees. J Comp Physiol A 177:247-259 Goldblatt P, Manning JC & Bernhardt P (1995) Pollination biology of Lapeirousia subgenus Lapeirousia (Iridaceae) in southern Africa: floral divergence and adaptation for long-tongued fly pollination. Ann Missouri Bot Gard 82:517-534 Goulson D & Jerrim K (1997) Maintenance of the species boundary between Silene dioica and S. latifolia (red and white campion). Oikos 79:115-126 Grant V (1949) Pollination systems as isolation mechanisms in angiosperms. Evolution

3:82-97

Grant V (1971) Plant speciation. Columbia University Press, New York Grant V (1994) Modes and origins of mechanical and ethological isolation in angiosperms. Proc Natl Acad Sci USA 91:3-10 Grimaldi D (1999) The co-radiations of pollinating insects and angiosperms in the

Cretaceous. Ann Missouri Bot Gard 86:373-406 Heinrich B (1975) Bee flowers: a hypothesis on flower variety and blooming time. Evolution 29:325-334

Heinrich B (1976) The foraging specializations of individual bumblebees. Ecol Monogr 46:105-128

Hodges SA, Burke JM & Arnold ML (1996) Natural formation of Iris hybrids:

experimental evidence on the establishment of hybrid zones. Evolution

50:2504-2509

Inouye DW (1978) Resource partitioning in bumble bees: experimental studies of foraging behavior. Ecology 59:672-678 Johnson SD (1996) Pollination, adaptation and speciation models in the Cape flora of

South Africa. Taxon 45:59-66 Johnson SD & Steiner KE (2000) Generalization versus specialization in plant pollination systems. Trends Ecol Evol 15:140-143 Jones KN (1996) Fertility selection on a discrete floral polymorphism in Clarkia

(Onagraceae). Evolution 50:71-79 Jones KN (1997) Analysis of pollinator foraging: tests for non-random behaviour. Funct Ecol 11:255-259

Jones KN & Reithel JS (2001) Pollinator-mediated selection on a flower color polymorphism in experimental populations of Antirrhinum (Scrophulariaceae). Am J Bot, in press.

Kadmon R (1992) Dynamics of forager arrivals and nectar renewal in flowers of Anchusa strigosa. Oecologia 92:552-555 Klips RA (1999) Pollen competition as a reproductive isolating mechanism between two sympatric Hibiscus species (Malvaceae). Am J Bot 86:269-272 Kondrashov AS & Kondrashov FA (1999) Interactions among quantitative traits in the course of sympatric speciation. Nature 400:351-354 Laverty TM & Plowright RC (1985) Competition between hummingbirds and bumble bees for nectar in flowers of Impatiens biflora. Oecologia 66:25-32 Leebens-Mack J & Milligan BG (1998) Pollination biology in hybridizing Baptisia

(Fabaceae) populations. Am J Bot 85:500-507 Levin DA (1978) The origin of isolating mechanisms in flowering plants. Evol Biol 11:185-317

Levin DA (1983) Polyploidy and novelty in flowering plants. Am Nat 122:1-25 Lincoln R, Boxshall G & Clark P (1998) A dictionary of ecology, evolution andsystematics. 2nd edn. Cambridge University Press, Cambridge Lynch M & Walsh B (1998) Genetics and analysis of quantitative traits. Sinauer, Sunderland, MA

Milne RI, Abbott RJ, Wolff K & Chamberlain DF (1999) Hybridization among sympatric species of Rhododendron (Ericaceae) in Turkey: morphological and molecular evidence. Am J Bot 86:1776-1785 Ollerton J (1996) Reconciling ecological processes with phylogenetic patterns: the apparent paradox of plant-pollinator systems. J Ecol 84:767-769 Possingham HP (1988) A model of resource renewal and depletion: applications to the distribution and abundance of nectar in flowers. Theor Popul Biol 33:138-160 Raven P (1972) Why are bird-visited flowers predominantly red? Evolution 26:674 Rieseberg LH (1997) Hybrid origins of plant species. Ann Rev Ecol Syst 28:359-389 Rieseberg LH & Carney SE (1998) Plant hybridization. New Phytol 140:599-624 Schemske DW & Bradshaw HD (1999) Pollinator preference and the evolution of floral traits in monkeyflowers (Mimulus). Proc Natl Acad Sci USA 96:11910-11915 Segraves KA & Thompson JN (1999) Plant polyploidy and pollination: floral traits and insect visits to diploid and tetraploid Heuchera grossulariifolia. Evolution 53:1114-1127

Servedio MR (2000) Reinforcement and the genetics of nonrandom mating. Evolution

54:21-29

Soltis DE & Soltis PS (1993) Molecular data and the dynamic nature of polyploidy. Crit

Rev Plant Sci 12:243-275 Thompson JD & Lumaret R (1992) The evolutionary dynamics of polyploid plants:

origins, establishment and persistence. Trends Ecol Evol 7:302-307 Thomson JD (1996) Trapline foraging by bumblebees. I. Persistence of flight-path geometry. Behav Ecol 7:158-164 Turner ME, Stephens JC & Anderson WW (1982) Homozygosity and patch structure in plant populations as a result of nearest-neighbor pollination. Proc Natl Acad Sci USA 79:203-207.

Waser NM (1986) Flower constancy: definition, cause, and measurement. Am Nat

127:593-603

Waser NM (1998) Pollination, angiosperm speciation, and the nature of species boundaries. Oikos 82:198-201 Waser NM, Chittka L, Price MV, Williams N & Ollerton J (1996) Generalization in pollination systems, and why it matters. Ecology 77:279-296 Wilson P, Thomson JD (1996) How do flowers diverge? In: Lloyd DG & Barrett SCH (eds) Floral biology: studies on floral evolution in animal-pollinated systems, pp 88-111. Chapman & Hall, New York Wolfe AD, Xiang QY & Kephart SR (1998) Diploid hybrid speciation in Penstemon (Scrophulariaceae). Proc Natl Acad Sci USA 95:5112-5115

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