582 
R. EUGGLES GATES AND NESTA THOMAS. 
lata, derived from the pollinatioa of one lata plant with 
a small quantity of pollen produced by another. 
The history of cult. No. 142 is as follows : A packet of 
lata seeds kindly sent by Professor de Yries yielded in 1909 
seventy-five plants, all of which were Lamarckiana except 
eight. Of the latter, four were lata, three semilata, and 
one aberrant. One of the semilatas self-pollinated produced 
in 1911 forty plants, of which three came into bloom and 
were semilata. The others remained rosettes and as such 
could not all be classified, thoug-h twenty-two of them were 
Lamarckiana and ten formed a variable semilata series. 
One of the three semilatas which bloomed was again selfed, 
and yielded cult. 142 in 1912. The hitter consisted of 
only three plants, two of which were typical lata with 
15 chromosomes (see table), and one Lamarckiana with 
14 chromosomes. The latter, however, differed from typical 
Lamarckiana in having nearly smooth leaves, some of 
which were cordate in shape. 
Thus semilata gives Lamarckiana offspring, having 
14 chromosomes, and latas with 15 chromosomes, as well as 
semilatas. Latawhen selfed gives Lata and Lamarck- 
iana and other mutations as well, while lata x Lamarck- 
iana yields lata, Lamarckiana and semilata, with 
occasional others. 
Cult. No. 114 was grown from seeds of Qlnothera 
obtained from Birkenhead, England, in 1906. The culture 
contained six plants, of which two belonged to a type we call 
English lata,’^ which closely resembles CE . semilata. 
One of the most interesting plants in this series of lata 
and semilata form's is found in cult. 213. This culture, 
which has been briefly described elsewhere by one of us 
(Gates, 1912a), was a race of (E. biennis, derived from the 
Madrid Botanic Garden in 1909 : 122 plants were brought 
to maturity in 1912, of which 23 belonged to a type having 
L amarckiana-like foliage, one was more finely crinkled, 
91 resembled rubrinervis in having red midribs, 6 bore 
narrow, furrowed leaves like Imvifolia, and 1 had the 
