11(4 Viiriatidii in llu M<ih lltiji, lluiiiiilii> lu|iulus L. 



Sucli cliaiacteis as ruugliiiess of bine, colour of leaves, recurving 

 and wrinkling of leaves, length of interuodes, etc., are perhaps not 

 sufficiently distinctive for types to be defined, but they may be useful 

 in distinguishing varieties wliich show a constant feature in one or 

 more of these characters. 



The variation in the glautlulatiou of the disc, anthers, aiul pcriantli- 

 lobes of the flowers serves chiefly to distinguish the Oregon and the 

 English plants, though it is possible that forms may arise among the 

 latter wliich will resemble the former in (jne or more of these characters; 

 some of the English plants, as already shown, approach the Oregons 

 in tlieir relative high number of glands on the perianth-lobes. It also 

 ])rovi(les a basis of observation when investigating the trausmis.sion 

 of characters to the hybrid offspring obtained by crossing the two 

 forms. Whether a male ho]) which produces a large number of glands 

 will transmit that character to its progeny (male and female) is a 

 (juestion that only future experiments will decide, but it is presumable 

 that such a plant would .be more valuable in that direction than one 

 in which the factors necessary for gland production are but feebly 

 developed. Should breeding experiments prove that this is the case 

 the value of observation concerning this character in the males will 

 be enhanced. 



In accordance with the above scheme of I i/pe-characters (limited 

 to four pairs of such characters) it is conceivable that we may have 

 16 lype-variclies, each of which will possess 4 of those characters, one 

 of each pair. Of the male hops hitherto examined only one conforms 

 to this idea of type-varieties, and but one hill of this hop (No. 67) 

 has been available, so that the constancy of its characters is some- 

 what uncertain, though, since it was planted out in the garden in 

 1909, the features characteristic of the mature plant were probably 

 established when observations commenced in 1912. During the three 

 seasons 1912-13-14 it has shown the following type-characters: 



I rt, early flowering (June 2(ith .inly lltli; av. Julv -jth). 



II b, red bine. 



III/>, short laterals (S in. to 2 ft. 6 in.). 



IV b, few glands on leaf (16 31 ; av. 23). 



A few plants possess three type-characters, others two, e.g. E 16 

 [= 44; 48] is late in flowering (I b), has a green bine (II a), and long 

 laterals (Ilia); its average number of glands is 41, so that in this 

 respect it is an intermediate form. 



