NOTES AND ABSTRACTS. 



whilst the terminal bud is delayed till the following summer. 

 (/) Plants resembling annuals or biennials in root system but 

 perennials and assimilating in winter (Daisy, Viola odorata, &c.). 

 (g) Perennials with underground rhizomes assimilating during the 

 whole year (Agropyrum, Rumex acetosella Sec), (h) Similar to the 

 above, but with two sorts of shoots, one arising in winter and dying 

 in the autumn, and others beginning in autumn and dying in early 

 spring (Yarrow, Galium verum). {i) A heterogeneous set which have 

 leaves assimilating in winter, but gradually dying off before spring. 

 {j) Annual summer plants (Cakile, &c.). {k) Perennials losing their 

 leaves in autumn (Rumex, Parnassia, most trees). (/) All the remainder. 



The shadow and sun forms of Polygonatum officinale are described, 

 and also the various environmental forms of Bracken. 



Calamagrostis Epigeios is characteristic of the fixed dunes. 



Humulus Lupulus often destroys the trees on which it grows. 



The paper contains many other details regarding the growth and 

 habitats of dune plants, but these can hardly be given in an abstract. 



G. F. S. E. 



Electricity, Application of, to Plant Production. By J. H. 



Priestley (Gard. Chron. April 11 and 18, 1914, pp. 245-7 and 271 ; 

 4 figs.). — Based on experiments carried out by the University of Leeds 

 and others, it has been ascertained that the electrical discharge from 

 overhead wires is carried by wind, and therefore control areas con- 

 tiguous to the electrified plots are affected sufficiently to render the 

 experiments invalid unless the amount of electricity on each is known. 

 In later experiments galvanized wire screens are being used to cut off 

 some of the discharge. — E. A. B. 



Elm-Tree Pests, Control of Two. By Glenn W. Herrick 

 {U.S.A. Exp. Stn., Cornell, Dep. Entom., Bull. 333, May 1913 ; 18 figs.). 

 — The pests here described are the elm-tree leaf-beetle (Galerucella 

 luteola Miill.) and the elm-tree leaf miner (Kaliosipphinga ulmi Sund.), 

 the latter being the larva of a small sawfly. — V. G. J. 



Epidendrum profusum (Bot. Mag. tab. 8551).— Mexico. Nat. 

 Ord. Orchidaceae, Trihe Epidendreae. Herb, epiphytic. Leaves 

 ligulate, 7-14 inches long. Flower if inch across. Sepals and 

 petals spreading, pale yellowish-green. Lip 3-lobed, white, streaked 

 with purple. — G. H. 



Erythrina pulcherrima (Bot. Mag. tab. 8532).— South America. 

 Nat. Ord. Leguminosae, Trihe Phaseoleae. Tree to 30 feet. Leaves, 

 pinnately 3-foHate, leaflets 2j-3f inches long. Inflorescence 3- 

 flowered. Standard 2 inches long, ij inch wide. Keel, if inch 

 long, scarlet. — G. H. 



Fern Caterpillar, The Florida. By F. H. Chittenden, Sc.D. 

 (U.S.A. Dep. Agr., Bur. Entom., Bull. 125, Oct. 1913 ; i fig.). — During 

 recent years a species of caterpillar, Eriopus floridensis Guen,, native 



