Malva neglecta
Malvaceae
Description:
Pollen monads, size class large, diameter 50-55 μm, shape spheroidal, equatorial outline circular; aperture type pantoporate, pores numerous (28-41 or more), pores large 3-6 μm, pores in spiral pattern; ornamentation echinate, granulate, spines dimorphic, large and pointy or shorter and blunt, straight or curved.
Spine Index, the proportion between spine length and width at base, is used to distinguish species (Shaheen et al. 2009).
Pollination Biology:
This species is visited by a wide variety of insects, including honey bees, carpenter bees, Halictid bees, mason bees, and also a variety of flies and butterflies (Hilty 2010).
Tropicos Pollen Voucher:
Yatskievych 99-15
Links:
University of Arizona - Malvaceae
Weedy Wildflowers of Illinois (Hilty 2010)
Brian Johnston photographs - Malva neglecta
USDA Plants – Malva neglecta
Species in Missouri:
Malva moschata L.
Malva neglecta Wallr.
Malva parviflora L.
Malva pusilla Sm.
Malva sylvestris L.
Malva verticillata L.
References:
Bibi, N., ,N. Akhtar, M. Hussain, and M. Ajab Khan. 2010. Systematic implications of Pollen morphology in the family Malvaceae from Northwest Frontier province, Pakistan. Pak. J. Bot. 42: 2205-2214.
Christensen, P.B. 1986. Pollen morphological studies in the Malvaceae. Grana, 25: 95-117.
El Naggar, S.M. 2004. Pollen morphology of Egyptian Malvaceae: An assessment of taxonomic value. Turk. J. Bot. 28 (2004) 227-240.
Hilty, J. Editor. 2010. Insect Visitors of Illinois Wildflowers. World Wide Web electronic publication. flowervisitors.info, version (04/2010).
Ruan, C., Teixeira da Silva, J. and P. Qin. 2010. Style curvature and its adaptive significance in the Malvaceae. Plant Systematics and Evolution 288: 13-23.
Shaheen, N., M. Ajab Khan, G. Yasmin, M. Q. Hayat and S. Ali. 2009. Taxonomic Implication of Palynological Characters in the Genus Malva L., Family Malvaceae from Pakistan. American-Eurasian J. Agric. and Environ. Sci., 6: 716-722.