Abstract
SUMMARY Pollen grain studies have been made of 50 species of the Labiatae occurring naturally in Michigan and of 5 cultivated species. The characteristics of pollen grain morphology are discussed and are also summarized in a table. For a number of species, a determination has been made of nuclear content of pollen grains at anthesis. Two major morphological groups of grains have been recognized: those that are binucleate and tricolpate and those that are trinucleate and hexacolpate. This observation confirms a previous report of this condition. Variation in size and increase in number of colpi within individual plant specimens have been observed in 5 naturally occurring species. Comparaisons have been made of untreated plants with a cultivar which was irradiated or treated with colchicine. Pollen grains with more than 6 colpi also have been found to be trinucleate. A key to 49 species (based on acetylated pollen grains) has been constructed.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 4
Claim · model-written summary
Labiatae pollen grains fall into two major morphological groups: binucleate and tricolpate, and trinucleate and hexacolpate.
Verbatim
t0“POLLEN GRAIN STUDIES OF THE LABIATAE OF MICHIGAN”
e2“Two major morphological groups of grains have been recognized: those that are binucleate and tricolpate and those that are trinucleate and hexacolpate”
Claim · model-written summary
Pollen size and colpi number varied within individual plant specimens of five naturally occurring Labiatae species.
Verbatim
t0“POLLEN GRAIN STUDIES OF THE LABIATAE OF MICHIGAN”
e3“Variation in size and increase in number of colpi within individual plant specimens have been observed in 5 naturally occurring species”
Claim · model-written summary
Pollen grains with more than 6 colpi were trinucleate.
Not reportedDirection
Verbatim
t0“POLLEN GRAIN STUDIES OF THE LABIATAE OF MICHIGAN”
e4“Pollen grains with more than 6 colpi also have been found to be trinucleate”
Claim · model-written summary
A species key of 49 Labiatae species was constructed based on acetylated pollen grains.
Verbatim
t0“POLLEN GRAIN STUDIES OF THE LABIATAE OF MICHIGAN”
e5“A key to 49 species (based on acetylated pollen grains) has been constructed”