No. 532] GENETIC AL STUDIES OX (EXOTII ERA 



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B, employed in the hybrid studies of the present paper, 

 when under good cultivation are as follows: 



1. Rosettes.-The mature rosettes (Fig. 1), from 3 to 4 

 dm. broad, have about 40 closely clustered leaves, spatu- 

 late, irregularly toothed at their base, and green except 

 for occasional reddish spots. The rosettes are persistent 

 and conspicuous during the early development of the main 



2. Mature Plants.— The mature plants, 1-1.5 m. high, 

 have a spreading habit (Fig. 2) with long side branches. 

 Stems chiefly green (brownish below), the papillate 

 glands at the base of long hairs also green. Basal 

 leaves on the main stem narrowly elliptical, about 16 cm. 

 long (Fig. 3), leaves above lanceolate. 



3. Inflorescence.— Bracts lanceolate, less than half the 

 length of the buds (Fig. 4). 



4. Buds.— About 5.5 cm. long, the cone 4-angled (Fig. 

 4). Sepals clear green, their tips not markedly attenuate. 



