340 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



the subject under the following heads : — Morphological Cytology, Nuclear 

 Substance, Physiological Cytology, Evolutionary Cytology, Experimental 

 Cytology, Ecological Cytology, and Taxonomic Cytology.— M. C. C. 



Plant-drying-, Instructions for. By C. Curtis, F.L.S. (Gard. 

 Mag. No. 2527, p. 216; 5/3/1902).— This subject is not altogether 

 foreign to horticulture, as it is often useful to know how to dry plants in 

 a proper way suitable for herbaria. Mr. Curtis has been a practical plant 

 collector in many countries, and knows by experience how valuable is the 

 knowledge of how to do the process properly. In this article he gives 

 minute details of his method, and one can see that he is anxious to tell 

 all he knows about the matter. Many gardeners travel, and if true to 

 their calling they will instinctively desire to collect specimens of plants 

 they do not know, and in this article they will find all the information 

 they require about the proper way of proceeding. — W. G. 



Plants used by the Indians of Mendocino County, California. 



By V. K. Chesnut (Contributions from the U.S. National Herbarium, 

 vol. vii. No. 3; U.S. Dep. of Agric, Div. of Bot. ; 1902).— This is an 

 account of some 400 plants, with Latin and Indian names, used by the 

 natives, and the purposes to which they are applied. It is interspersed 

 with numerous photos of plants, of natives collecting them, &c, as well 

 as some of their manufactures, as baskets and works of art ; also of the 

 methods of grinding and preparing acorns for food, and are of liliaceous 

 edible bulbs. The work concludes with a classified 'list of economic plants 

 ranged under a large number of headings. — G. H. 



Platyclinis filiformis, Benth. (Cogniaux in Diet. Icon. Orch. 

 Platyclinis ; pi. 1; 2/1902). — An " inconspicuous " but graceful species 

 from the Philippines, introduced by Mr. Bateman in 1841. Flowers pale 

 green, minute, borne in long pendent racemes. — C. C. H. 



Platyclinis glumacea, Benth. (Cogniaux in Diet. Icon. Orch. 

 Platyclinis ; pi. 2 ; 2/1902). — This species was discovered in the Philip- 

 pines by Cumming in 1839, and first flowered in Europe by Messrs. 

 Loddiges in 1841. Flowers small, in pendent racemes, white shaded pale 

 yellow, sweetly scented. — C. C. H. 



Plectranthus Mahonii. By Sir J. D. Hooker (Bot. Mag. tab. 

 7818). — Nat. ord. Labiatce, tribe Ocimoidcce. Native of British Central 

 Africa. It flowered at Kew in November 1900. The flowers are very 

 numerous, violet blue. — G. II. 



Plum, The Beach, viewed from Botanical and Economic 

 Aspects. By Prof. J. M. Macfarlane (Contr. Bot. Lab. Phil. vol. ii. r 

 No. 2, p. 210 ; pis. 20, 21 ; 1901).— The Beach Plum (Primus maritima) is 

 abundant along the coast regions of the Eastern States, from Virginia to 

 New Brunswick. Grows ordinarily to a height of 5 or 6 feet, occasionally 

 from 10 to 12 feet. Important lines of variation shown by the fruit 

 in (a) colour, (b) weight, (c) size and shape, (rl) consistence, (e) taste, 

 (/) time of maturation. 



