lalilae system aticae ex Herbario Hortf Botanici Pelrnpolifani. 
BOTAHH^ECKHE MATEPHAJIM 
fepfiapaa fnaBHoro EoTaHHiecKiro Capa P. C. U. C. P., 
H3«aBaeMHe noa peaaKUHetf HiaBHoro EoTaHHKa E. A. (DeaneHico. 
B^ 2 - T - 111 - BMnycK 38—39. 30 ce H Ta6pa. 
H H. Ky3HeL)0B. N. I. Kusnecov. 
H Bonpocy o npoHcxojKaeHHH apKTBiecKoi $jiopu 
Seasiiorc icapa. 
Florae arcticae origo. 
I. Poa Dryas L. Genus Dryas L. 
TaKHM o6pa30M, Ha^HHan c bh^ob po^a Dryas’a, mu 
npocaeAHJiH see thbu ce M . Rosaceae, 6. h. m. cfmjioreHe- 
THHecKH 6 jih3kii6 k po^y Dryas, h aonnra ao Tnna Holo- 
discus c paapoBHeHHUM apeaaoM reorpa<J)HHecKoro pac- 
npocTpaHeinra h c nepBo6tiTHofi nepexcwHoik opramiaa- 
UneS csoero CTpoeHHH, h6o thii Holodiscus BMemaeT b 
ce6e npHBHaKH paajra<mux <|)HJioreHeTjnecKHx jnmirfi 
ceM. Rosaceae. OTnaeTH 3 to npoTOTHir enupeftnux, ot- 
^acTH—Apna/iHH, a OT^acra h nepKOKapnim. 8 tot opn- 
THHajiBHufi Tun Rosaceae MU H MoaceM npnanaTb, Kan 
aa hcxoahuS Han6ojiee ^peBHafi po^oHaiajitHtifi thh 
po^a Dryas. Ha npujiaraeMoa cxeMe a nuTaiocL 
xoth 6 u npH6jiH3HTejn>Hoe mnoTeTHHecKoe npe^cTaBjieHne 
o ^HJioreHeTHnecKOM npoHcxoHcaeHHH po^a Dryas (cm. 
<J>ar. 1, na CTp. 136). 
