4:V2 SYS'irM. {'//(' roMoLOCY 



coming bronzed wlion overripe; core larj^^e ;iii<l ratlier liard ; flesh soft, 

 sweet, rieli ; <|unlity very good. 



680. McDonald (Fig. 2r)0) is a l)lackberry-(li'vvl)erry iiyi)rid 

 miicli «rr<)\vn in the southwest. The plants are very vigorous, 



remarkably productive, immune to rust, better 

 able to withstand drought than most other 

 brambles, and ripen their crop two weeks be- 

 fore the earliest blackberry. The canes trail 

 the first season, but send up strong drooping 

 Fig. 250 McDon- ^anes in succeeding years. The variety is self- 

 sterile and must be inter-])lanted with another 

 blackberry for a pollenizer. The berries are large, oblong, very 

 good in quality, and hang in good condition on the vines for 

 three or four days after ripening. The variety came into promi- 

 nence in the southwest about 1912. 



681. Mammoth. Lowbernj. Black Loganberry. — This is an- 

 other blackberry-dewberry hybrid usually listed with blackber- 

 ries. Mammoth thrives only on the Pacific slope, being too ten- 

 der to cold for the East. The variety is remarkable for its 

 enormous berries and its long trailing vines, wiiich sometimes 

 attain a length of twenty-five or thirty feet. The canes are 

 stout and covered with small short spines ; they grow upright 

 several feet and then begin to trail. Eventually the tips take 

 root; tipping is the method of propagation. The leaves are 

 semi-evergreen in California. The berries, while soft for dis- 

 tant shipment, are excellent for local markets and home use. 

 The blossoms are self-sterile and the loganberry makes a good 

 pollenizer. 



682. Mersereau has long been a dependable variety for both 

 market and home in the northern and eastern states. It fails 

 in the South because of susceptibilitj^ to rust. Mersereau is a 

 seedling of Snyder which it surpasses in vigor of plant and in 

 size and quality of berry. The variety originated with J. M. 

 Mersereau, Cayuga, New York, about 1890. 



Plant tall, vigorous, upright, hardy, productive, susceptible to rust; 

 canes numerous, light red, furroAved, with long strong straight prickles. 

 Leaflets 3-5, palmate, oval-lanceolate, pale hoary pubescence beneath, with 



