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THE FLORAL BIOLOGY OF THREE SPECIES OF <i>VIOLA</i>
2/2 checkable references clean · checked 2026-07-22
Every reference with a DOI in the deposited reference list resolved to a known work in Crossref or DataCite at the dated check, and none carried a retraction, withdrawal, or removal notice.
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The 2 checked references that resolve
The 10 references without a DOI — listed, not checked
no DOI — not checkedPollination ecology of Viola: I. Contents of stigniatic cavities
no DOI — not checkedBeattie A. J.(1968b).Studies in the pollination ofViola.Ph.D. thesis University of Liverpool.
no DOI — not checkedBurkhardt D. Schleidt W.&Altner H.(1966).Signals in the Animal World. London .
no DOI — not checkedViola rafinesquii, the only Melanivim violet native to North America
no DOI — not checkedFaegri K.&Pijl L.van der(1966).The Principles of Pollination Ecology. London .
no DOI — not checkede_1_2_1_7_1
no DOI — not checkedLovell J. H.(1918).The Flower and the Bee. New York .
no DOI — not checkede_1_2_1_10_1
no DOI — not checkedThe experimental taxonomy of two species of Viola
no DOI — not checkedVariation and Evolution in the genus Viola
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