THE GENOTYPICAL RESPONSE OF THE PLANT 257 
teristic meant being the long-stalked, leafy fruiting-bractlets. Probably 
the name A. patulum f. helolepis Fenzl., current in some of the syste- 
matic handbooks, also belongs to this type. 
c. The type of the western coast strip. 
Forms belonging to this type are already found in the region of 
Kullen, in north-western Scania, and they extend at least as far as to 
the middle part of Bohuslän. Cultivated material from along this 
coast strip shows a great hereditary variation. Individuals with leafy, 
long-stalked fruiting bractlets are entirely absent. The forms of this 
type show most resemblance to the praecox-type as to fruiting bract- 
lets, but the branching habit is different. They are usually much 
branched at the base and most often prostrate both as to main axis 
and as to basal branches. A number of biotypes have been isolated 
since 1917, when the first individuals of this type were brought into 
‘culture. Table 5 characterizes the most important biotypes now in 
culture, and gives information as to the place and year of the collec- 
tion of the original mother-plants. 
TABLE 5. 
3 & AS aa # ST RES TR 
Ed Position of Pcie Colour of | Nature of Place and year of coll. 
> | main axis a leaves leaf margin of mother-plant 
| = branches 
63 | Ascending- Procumbent| Blue-green Entire Marstrand, Boh., 1920 
erect 
64 |Procumbent » » » Varberg, Hall., 1919 
65 » | » Dark-green Denticulate » » » 
66| Prostrate » » Entire » » » 
67 » » Blue-green » Falkenberg, Hall., 1919 
120 » Prostrate |Dark-green » Hall. Väderö, Scania 1917 
122 » » » Denticulate| » » » » 
125 » » Blue-green| Dentate » » yee 1918 
128 » » » Entire » » » » 
Field nos. 63 and 64 are shown in figs. 30 and 31, and field nos. 
120 and 128 in figs. 32 and 33. Some of the isolated plants gave an 
offspring which corresponded in every characteristic with their original 
mothers indicating autogamy, others showed segregation as to leaf co- 
lour, leaf margin, and branching habit. Self-fertilization seems to be 
the rule in most of the forms, however, as cases of vicinism are very rare 
in the plants sown from seed harvested from unprotected individuals in 
the cultures, where a number of different biotypes are grown close by. 
