ea 
Rhodora 
JOURNAL OF 
THE NEW ENGLAND BOTANICAL CLUB 
Vol. 15. October, 1913. No. 178. 
INHERITANCE OF SEX FORMS IN PLANTAGO 
LANCEOLATA. 
By HarLeY Harris BARTLETT. 
In a former paper in this journal the writer! reported upon the 
first filial generation of a “second form hermaphrodite” of Plantago 
lanceolata, — a form which is structurally hermaphrodite but func- 
tionally pistillate. This F; generation, which resulted from unguarded 
wind-pollination of the 2d form mother plant by pollen from 1st form 
hermaphrodites, included, if certain aberrant plants are disregarded, 
about 60% of plants like the seed parent (called “yellows” for short, 
on account of the color of the anthers) and about 40% of plants like 
the pollen parent (“whites”). Because of the rarity of the 2d form 
hermaphrodite in the locality where the original mother plant was 
found, it is likely that the pollen parents of the F; generation were for 
the most part either whites which did not belong to any gynodioecious 
strain, or else members of a gynodioecious strain consisting of 1st 
form hermaphrodites and structurally pure pistillates. In its second 
flowering season the original mother plant was surrounded by its own 
progeny, and isolated in one of the inner houses of a long range of 
greenhouses from other plants of the species. Consequently, it is 
fair to conclude that it was this time pollinated by whites belonging 
to the gynodioecious strain. A second: F; generation was therefore 
grown in order to determine whether or not the progeny would show 
the same forms as when pollinated by unrelated plants of other strains. 
1 Bartlett, H. H.: On gynodioecism in Plantago lanceolata. Rnopona, xiii. (1911) 
pp. 199-206. 
