32 MORPHOLOGY, ETC., VASC. PLANTS [Box. Absts., Vol. X, 



171. PiNELLE, J. Nerprun hybride : Rhamnus hybrida. [Hybrid Rhamnus.] Rev. Hort. 

 93:204-265. Fig. 67. 1921. — The tree is excellent for planting singly or in masses on poor 

 soils. Brief historical and descriptive notes are given. — E. J. Kraus. 



172. PouPiON, J. Le Saurauja punduana Wall. Rev. Hort. 93: 260-262. Fig. 65-66. 

 1921. — Descriptive and detailed cultural notes are given. — E. J. Kraus. 



173. PouPiON, J. Phytelephas macrocarpa: sa culture en serre. [Greenhouse culture of 

 P. macrocarpa.] Rev. Hort. 93: 248-249. Fig. 64. 1921. — General directions for planting 

 the seeds, care of seedlings, and maintaining the plants are given. — E. J. Kraus. 



174. PuviLLAND, J. Marronnier d'Inde a fleurs blanches pleureur: Aesculus hippocas- 

 tanimi var. pendula. [White-flowered weeping horse-chestnut.] Rev. Hort. 93: 281. 1921. 



175. RoLET, A. Les oeillets crevards. [Split carnations.] Rev. Hort. 93: 275-276. 

 1921. — Quickened vegetation after a period of relative inactivity, excess of nitrogen, lack of 

 light, irregular temperatures, dry soils, and character of the variety are among the factors 

 which have been assigned as causes of calyx splitting. The subject is still a matter for inves- 

 tigation of individual varieties. — E. J. Kraus. 



VEGETABLE CULTURE 



176. Meunissier, E. L'epinard: culture printani&re. [Spring culture of spinach.] Rev. 

 Hort. 93:251-252. 1921. 



MORPHOLOGY, ANATOMY AND HISTOLOGY OF VASCULAR 



PLANTS 



E. W. SiNNOTT, Editor 

 (See also in this issue Entries 91, 133, 2^4, 295, 302) 



177. Bateson, W. Variegation in a fern. Nature 107: 233. 1921. — The author corrects 

 a statement made in the Croonian Lecture (see Bot. Absts. 8, Entry 226) . Prothallia of varie- 

 gated Adiantum show light areas when examined by transmitted light. — 0. A. Stevens. 



178. Briquet, J. Sur la presence d'acarodomaties foliaires chez les Clethracees. [On 

 the presence of foliar acarodomatia among the Clethraceae.] Compt. Rend. Soc. Phys. et 

 Hist. Nat. Gen&ve 37: 12-15. 1920. — Foliar acarodomatia are unknown among the Clethra- 

 ceae except in 1 species, Clethra barbinervis Sieb. et Zucc, of China and Japan. The leaves 

 have 2 kinds of trichomes, strigose and stellate. At the points where the lateral veins leave 

 the midrib, there is a dense tuft of fascicled hairs, persisting throughout the duration of the 

 leaf. These usually contain mites or their remains. — A. Gundersen. 



179. Briquet, J. Sur 1 'organization et I'edaphisme des f euilles ericoides chez les Pertya 

 phylicoides Jeffrey. [On the organization and edaphism of the ericoid leaves of Pertya phylicoides 

 Jeffrey.] Compt. Rend. Soc. Phys. et Hist. Nat. Geneve 37: 15-19. 1920.— The species of 

 the genus Pertya, Compositae-Mutisieae, have no special vegetative peculiarities; Pertya 

 phylicoides, described in 1912 and growing on arid calcareous cliffs in Yunnan at 3000 m. alti- 

 tude, is, however, an exception. The leaf is completely rolled, forming an interior chamber 

 filled with long hairs. The chamber communicates with the exterior by a long slit, narrower 

 toward the summit. Very minute stomata are numerous on the inside. The parietal canals 

 of the exterior epiderm probably facilitate the rapid growth of the thick cuticle. — 

 A. Gundersen. 



180. Campbell, D. H. The eusporangiate ferns and the stelar theory. Amer. Jour. 

 Bot. 8: 303-314. 7 fig. 1921. — Following Van Tieghem's stelar hypothesis, it is commonly 

 assumed that the fibrovascular skeleton of the fern stem is a strictly cauline stele with which 



