SEED GROWERS 51 
LETTUCE 
Lactuca sativa 
TYPICAL EXAMPLES OF CRISP HEAD AND BUTTERHEAD TYPES 

Imperial 101 White Boston 
Ferry-Morse produced one of the first commercial crops of lettuce seed grown in Cali- 
fornia for Eastern shipment. Since that time our stocks of lettuce seed have won 
recognition as the standard of excellence throughout America and Europe—in fact, 
wherever lettuce is grown. Continuous and extensive breeding operations enable us to 
maintain this standard and to develop such strains as the lettuce growing industry 
requires. We have had marked success in developing strains which are highly resistant 
to disease as well as uniform and desirable in type and quality. 
In the following concise descriptions we have indicated the usual number of days 
required by the varieties to produce heads in Northern sections of the United States 
from seed sown out-of-doors late in April or early May, The number of days is not 
indicative of the time required under best conditions for growth in the lettuce growing 
sections of California and Arizona, but does indicate the comparative earliness of the 
varieties we list. 
Symbols: w.s.—White Seeded; b.s.— Black Seeded. 
Heading Varieties 
Days 
RET rms CU) Deen cS fee eye ne a ey atic a Pe tes apace “Ws igh bles) af bw at nial aigs 70 
A dependable and popular butterhead type, forming fairly good heads when 
the weather is so warm that most varieties fail. Head globular. 
ERS 8 Spa ai ARR on A ee rc ee 57 
A distinct, butterhead, very dark green variety popular in the middle South. 
Plant small, forming a rather loosely folded head of small size. Leaves 
thick, deep green, slightly tinged or spotted with brown. Should be planted 
early as it bolts to seed readily in hot weather. 
Seems eT LC) NEAL TOCAGETO JEW Sore 210s. bik hae cine nse Re icie nt =e low eee ME es 76 
Popular in all parts of the world; known as Trocadero in Europe. Good for 
summer and fall use out-of-doors, and for hotbed and cold frame culture, It 
is a butterhead type with glossy, plain edged leaves tinged brown on the 
margins; forms a firm, well folded head, buttery-yellow at the heart. 
