1914] 



GATES — SOME (ENOTHERAS FROM CHESHIRE AND LANCASHIRE 387 



entirely from one individual from a sowing of Birkenhead seeds 

 at Woods Hole in 1908. From this individual an Fi of 376 

 plants was grown in the two following years. About 4 per cent 

 of these plants showed virescence, as described in the above 

 paper. In 1910 a total of 297 plants were grown, most of which 

 belonged to the F2. An F3 numbering 193 plants in nine fam- 

 ilies was grown in 1911, and an F4 of 356 plants in eight fam- 

 ilies in 1912. The plants were by no means uniform, and they 

 varied considerably from year to year. The description given 

 is therefore a generalized one, and the condition of variability 

 is no doubt similar to that of many wild "species." By isol- 

 ating the offspring of a larger number of individuals, no doubt 

 this variation could have been further analyzed, but more 

 pressing problems have prevented this being done. 



Plate 20 fig. 1 shows a typical rosette of my 1909 culture, 

 pi. 20 fig. 3 the full-grown plant, and pi. 20 fig. 6 a flowering 

 shoot on a larger scale. Specimens of this species are preserved 

 in the herbarium of the Missouri Botanical Garden from my 

 cultures of 1909, and in the British Museum (Natural History) 

 from the 1912 famiUes. 



Description ; Rosette of few leaves, broad and obtuse-pointed, 

 somewhat crinkled. Full-grown plant pyramidal in outline, 

 with lateral branches and persisting rosette leaves. Average 

 height about 88 cm. Stems slender, stem-leaves smooth, lance- 

 olate, bracts broadly cuneate at base with a very short petiole, 

 tip long-pointed, more or less curled, margin irregularly repand- 

 denticulate. Inflorescence compact, flowers numerous; buds 

 squarish, slender with very long and slender sepal tips, sepals 

 thin, bud cone 35 mm. long, hypanthium 37 mm., sepal tips 7 

 mm., ovary 10 mm., petals 43 mm., very broad and overlapping 

 when flower is open, long hairs fairly numerous. Few red 

 papillae on main stem, many on side branches. In 1909 culture 

 the buds were all green, but in 1911 they had the red color 

 pattern of (E. mut. rubrinervis and the stems were also reddish. 



As regards variations, virescence appeared in the first two 

 generations but not in the last two. On the other hand, a var. 

 elliptica was first observed in F2 and further studied in F3 and 

 F4. This variety differs essentially in being smaller and having 

 narrower leaves and narrow, more or less elUptical petals. Plate 



