G. H. SHULL 87 



measurements are in centimeters and were made with a micrometer- 

 caliper by my scientific assistant, W. F. Friedman, to whose faithful 

 work and painstaking care it is a pleasure to give this grateful 

 recognition. 



O. rubrineroin O. rubricalyx 



Character 



Fed. No. 



Length of ovary ... 

 Thickness of ovary 1 

 Length of hypanthium ... 

 Thickness of hypanthium 2 

 Length of cone ... 

 Thickness of cone 3 

 Length of free tip 

 Length of anther 



Plants of the (6) group were distinguishable by their closer rosettes, 

 caused by the relatively short, ascending petioles and nearly horizontal 

 blades. They were recognized at once as nanella-like rosettes, though 

 their longer, narrower, less crinkled leaves distinguished them strikingly 

 from the nanella-form derived from 0. Lamarckiana. The adult plants 

 proved to be of little more than rawe//a-stature (25 40 cm.) as shown 

 in fig. 1, but of very unique aspect, due to the broad-lanceolate, 

 acuminate, dark green, nearly uncrinkled leaves. The buds were long, 

 slender and the cones nearly terete. Gates (1914) reports the occurrence 

 of dwarfs in his cultures of both 0. rubricalyx and 0. grandiflora, and 

 their recurrence in some of the F 2 families from crosses between these 

 two species. 



The group (c) differed from the (d) group in having conspicuous red 

 spots on the dorsal surface of the leaf-blades, as shown in the accom- 

 panying Plates. As Gates had found self-fertilized rubricalyx yielding 

 progenies containing both rubricalyx and rubrinervis, I at once inferred 

 that I was getting the same result, and that the spotted rosettes belonged 

 to the rubricalyx- and the unspotted rosettes to the rubrinervis-iype. 

 This did not prove to be true, however, as the entire (a) group, both 

 spotted and unspotted, had the intensely pigmented hypanthia and bud- 

 cones characteristic of 0. rubricalyx. In the adult stage the spotted and 

 unspotted groups, (c) and (d), were definitely differentiated from one 

 another in only one feature, namely, in the pigmentation of the stems. 

 The group grown from spotted rosettes, (ac), had intensely red-pigmented 

 stems, the pigment being particularly conspicuous about the base of the 



1 Greatest diameter. 



2 Least diameter. 



3 Greatest diameter parallel with sides. 



