Alexander Motten

Journal Article for submission to American Journal of Botany or American Midland Naturalist · 2009 Erythronium americanum and E. umbilicatum are spring wildflowers of deciduous forests in the eastern United States whose ranges overlap in North Carolina and Virginia. E. umbilicatum is a diploid progenitor of E. americanum, an allotetraploid. ... Cite

Anther-stigma separation is associated with inbreeding depression in Datura stramonium, a predominantly self-fertilizing annual.

Journal Article Evolution; international journal of organic evolution · November 2002 Genetically based variation in outcrossing rate generates lineages within populations that differ in their history of inbreeding. According to some models, mating-system modifiers in such populations will demonstrate both linkage and identity disequilibriu ... Full text Cite

ANTHER-STIGMA SEPARATION IS ASSOCIATED WITH INBREEDING DEPRESSION IN DATURA STRAMONIUM, A PREDOMINANTLY SELF-FERTILIZING ANNUAL

Journal Article Evolution · 2002 Genetically based variation in outcrossing rate generates lineages within populations that differ in their history of inbreeding. According to some models, mating-system modifiers in such populations will demonstrate both linkage and identity disequilibriu ... Cite

Heritability of stigma position and the effect of stigma-anther separation on outcrossing in a predominantly self-fertilizing weed, Datura stramonium (Solanaceae).

Journal Article American journal of botany · March 2000 A polymorphism for anthocyanin production was used as a genetic marker to document the relationship between anther-stigma separation and outcrossing rate in the predominantly self-fertilizing weed Datura stramonium. White-flowered plants that differed in a ... Full text Cite

A Simplified Experimental System for Observing Pollen Tube Growth in Styles

Journal Article American Biology Teacher · January 1, 1992 Full text Cite

Determinants of outcrossing rate in a predominantly self-fertilizing weed, Datura stramonium (Solanaceae)

Journal Article American Journal of Botany · January 1, 1992 Population-wide estimates of outcrossing rates were surprisingly low for a species with showy, entomophilous flowers and ranged from 1.9% in an experimental population with a "clumped' spatial arrangement to 8.5% in an experimental population with a "dispe ... Full text Cite

Sources of variation in plant reproductive success and implications for concepts of sexual selection

Journal Article American Naturalist · January 1, 1989 There is growing evidence of nonrandom reproductive success in plants. An experimental protocol was designed to yield more information on nonrandom transmission in general and on sexual selection as a special case. Reproduction is separated into pollinatio ... Full text Cite

Reproduction of Erythronium umbilicatum (Liliaceae): pollination success and pollinator effectiveness.

Journal Article Oecologia · September 1983 Erythronium umbilicatum (Liliaceae) is a common vernal herb of deciduous forests in the southeastern United States whose seed set depends on outcrossing by insects. Although only 40-60% of the ovules mature into seeds, hand-pollination experiments conducte ... Full text Cite

Autogamy and competition for pollinators in Hepatica americana ( Ranunculaceae).

Journal Article American Journal of Botany · January 1, 1982 Hepatica americana is one of the earliest flowering vernal herbs in the deciduous forests of piedmont North Carolina. Unlike most other members of the spring wildflower community, its flowers are nectarless and autogamous. The number of insect visits a flo ... Full text Cite