1911]  Bartlett,—Gynodioecism in Plantago lanceolata 205 
not be classed with the 1st form hermaphrodites on account of their 
strong gynomonoecious tendency. 
In vegetative characters the culture showed extreme diversity. 
One plant was the most narrow-leaved specimen of the species which 
the writer has thus far seen. Other plants showed almost maximum 
leaf breadth. (The mother was rather narrow-leaved.) In some 
of the progeny the leaves were prominently serrate, in others nearly 
entire. In pubescence, length of stigmas, shape of perianth parts, 
and development of anthocyanin there was no uniformity. There 
seemed to be no correlation of these characters with one another, 
except that perhaps narrow leaves were usually correlated with narrow 
perianth parts, and that 2d form hermaphrodites were never very 
broad-leaved. On the other hand, many narrow-leaved plants, 
including the exceptional one mentioned above, were of the Ist form. 
Seed from a purely pistillate plant of Plantago lanceolata were also 
harvested in the fall of 1910 and planted in a cold frame in sterilized 
soil. Unfortunately there was no room to pot the young plants, so 
that when they became over-crowded they had to be set out in the 
garden directly from the seed pans. A late frost destroyed all but a 
few of four hundred plants. The remainder, in bloom, were either 
like the mother (purely pistillate) or the usual 1st form hermaphrodite. 
The numbers of each type were not counted, however. The culture 
will be repeated next year. 
Correns has made a study of heredity in many gynodioecious plants. 
In those of his papers! which deal with Plantago lanceolata he has 
reported on the progeny of 28 plants whose pollination was unguarded, 
and four plants whose pollination was guarded. All of his mother 
plants seem to fall into the following categories: 1) pure Ist form 
hermaphrodites, 2) gynomonoecious types with a) some functional 
stamens, or b) all of the anthers contabescent, and 3) purely pistillate 
types. His tabulated results show that the progeny of all except 
certain of the pure hermaphrodite stocks included pure pistillates, 
and even in the case of one of the pure hermaphrodites, the pure 
pistillates amounted to 50%. Since in counting pure pistillate stocks, 
1 Correns: Die Vererbung der Geschlechtsformen bei den gynodiécischen Pflanzen. 
Ber. d. deutsch. bot. Ges. xxiv (1906) pp. 459-474. 
Zur Kenntnis der Geschlechtsformen polygamer Bliitenpflanzen und ihrer 
Beeinflussbarkeit. Jahrb. f. wiss. Bot. xliv (1907) pp. 124-173. 
Die Rolle der miinnlichen Keimzellen bei der Geschlechtsbestimmung der 
gynodiócischen Pflanzen. Ber. d. deutsch. bot. Ges. xxvi a (1908) pp. 683-701. 
