ABSTRACTS. 



779 



Pink, The Cheddar, at Home. By H. R. Richards (Jowrn. Hort. 

 p. 144 ; August 14, 1902).— The English habitat, the Cheddar Rocks in 

 Somersetshire, is described, and visitors are exhorted not to pull up the 

 plants, which will not transplant, but to collect seed, to sow on walls and 

 rockeries. Amongst other wild flowers associated with the Pink, the 

 yellow Welsh Poppy, Mcconopsis cambrica, is mentioned, a plant not 

 generally known to exist there. (The readiness with which Dianthus 

 ccEsius crosses in gardens makes it difficult to get cultivated seed which 

 will come true.) — C. W. D. 



Pinus (Laricio) pindieia. By M. T. Masters (Gard. Ghron* 

 No. 802, p. 302 ; figs. 95-97 ; May 10, 1902).— This tree was considered 

 a distinct species by M. Formanek, but Dr. Masters is of opinion that it 

 is only a marked variety of P. Laricio, which is a very variable species, 

 and he says : " To cultivators it is not material whether the form be con- 

 sidered as varietal or specific ; suffice it to say that for cultural purposes 

 it is distinct." A copy of the original Latin description is given, also a 

 description of P. Heldrichii, so that it may be better distinguished from 

 that species. This variety or species, whichever it may be, is a very 

 distinct form, and well worth cultivating. — G. S. S. 



Plant Diseases. By J. Percival (Journ. S.E. Agr. Coll. Wye, 

 No. 11, pp. 81-89 ; February 1902). — Experiments showed that Chrysan- 

 themum rust may be completely arrested by spraying once or twice a 

 week with solution of flowers of sulphur, at the rate of one ounce in ten 

 gallons of water, with a little soft soap added to make lather. — J". C. E. K. 



Plant Diseases of 1901. By Wendell Paddock (U.S.A. Exp. 

 Stu., Colorado Bull. No. 69 ; 9 plates). — The diseases enumerated are : — 

 Apple tree root-rot ; Apple tree rosette ; Blackberry root disease (Bhizo- 

 ctonia) ; Cherry-tree wound parasite ; Asparagus rust (Puccinia) ; Aster 

 wilt (Fusarium) ; Currant-cane disease (Nectria) ; Grape anthracnose 

 (Sphaceloma) ; Pea-root disease (Bhizoctonia ? ) ; Plum-leaf blight, or 

 shot-hole ; Potato diseases ; Quince rust (Gymnosporanginm) ; Straw- 

 berry-leaf blight (Spharella) ; Wheat stinking smut (Tilletia). 



M. C. C. 



Plectranthus saccatUS. By Sir J. D. Hooker (Bot. Mag. tab. 7841). 

 — Nat. ord. Labiatce, tribe Ocymoidecz. Native of Natal. It is a suffruti- 

 cose plant with large flowers nearly 1J inch long, with pale blue corollas. 

 It flowered at Cambridge. — G. H. 



Podoearpus peetinata. By Sir J. D. Hooker (Bot. Mag. 

 tab. 7854). — Nat. ord. Conijera, tribe Podocarpece. Native of New 

 Caledonia. It flowered at Kew in 1902. Male flowers only known. 



G. H. 



Pollination of Pears and Apples. By D. S. Bullock (U.S.A. 

 Eort. Soc. Bcp. Mick., 1902; pp. 115-116).— A list of insects (families 

 only) visiting Pear and Apple flowers. Hymenopterous insects most 

 useful and abundant. 



