276 MORPHOLOGY, ETC., VASC, PLANTS [BoT. Absts., Vol. X, 



23 forms, found in the neighborhood of the station. The present paper treats only part of 

 these. Details of the general morphology and histology of root, stem, and leaf are given for 

 the following plants: Geum parviflorum Sm., Cardamine heterophylla (Forst. f.) O. E. Schulz 

 (var.), Plantago triandra Berggr., Brachycome Sinclairii Hook, f., Gnaphalium Traversii 

 Hook. f. — Wm. Randolph Taylor. 



ISIS. Betts, ]\I. Winifred. Notes on the autecology of certain plants of the Peridotite 

 Belt, Nelson: Part I — Structure of some of the plants (No. 3). Trans, and Proc. New Zealand 

 Inst. 52: 276-314. 48 fig. 1920. — A continuation of a series of detailed descriptions of the 

 habit and the histology of the leaves and stems of plants of the Peridotite Belt. The following 

 species and varieties are considered in this paper: Cyathodes acerosa R. Br., Genliana corymhi- 

 Jera T. Kirk., Myosotis Monroi Cheesm., Euphrasia Monroi Hook, f ., Wahlenbergia albomargi- 

 nata Hook., Cebmsia longifolia Cass. var. gracilenta T. Kirk., Olearia virgata Hook, f ., Heli- 

 chryswn hellidioides Hook, f., Cassinia Vauvilliersii Hook. f. var. rubra Buch., Senecio 

 bellidioides Hook, f., Gahnia procera Forst., Astelia montana (T. Kirk) Cockayne, Dianella 

 intermedia Endl., Libertia ixioides Spreng. — Wm. Randolph Taylor. 



1819. Block, INIme. E. Modifications des racines et des tiges par action mecanique. 

 [Modifications of roots and stems by mechanical action.] Compt. Rend. Acad. Sci. Paris 172: 

 1524-1526. Fig. 1-6. 1921. — Roots of radish and sweet pea and stems of black nightshade 

 and buckwheat were studied. A portion of each was enclosed in a glass tube or between 

 glass plates, the remaining portions of the plant meanwhile continuing their development 

 under normal conditions. Development takes place above and below the encasement in 

 all instances. In stems, an enlargement or pad is formed above the encasement. Stems 

 of Impatiens parviflora form rootlets just below the encasement, but in Helianthus annuus 

 just above this region. No suberized phelloderm is formed beneath the glass as it is above 

 and below and in the controls. Root development above and below the encasement is normal. 

 — C. H. Farr. 



1820. Boos, Georg. Ueber die Natur einer gewissen Bliitenanomalie bei Ranunculus 

 acris L. [The nature of a flower anomaly in Ranunculus acris.] Bot. Notiser 1920: 151-154. 

 Fig. 1-11. 1920. — The author describes some anomalous flowers of Ranunculus acris found 

 at the botanic museum at Lund. The petals, stamens, and pistils had more or less reverted 

 into phyllomes. The petals were about half as long as in normal flowers, more or less 3-lobed 

 at the apex, yellowish green in the center like the sepals, pure yellow only along the margins, 

 without a nectary at the base, and hairy instead of glabrous on the back; the filaments were 

 more or less flattened and hairy; the anthers flat and containing less pollen than the normal 

 ones; the pistils hairy, not keeled on the upper margin, but mostly open, and without ovules. 

 —P. A. Rydberg. 



1821. Browne, Isabel M. P. A fourth contribution to our knowledge o.' the anatomy of 

 the cone and fertile stem of Equisetum. Ann. Botany 35: 428-456. PI. 21, 12 fig. 1921.— The 

 vascular systems of the cones of E. sylvaticum, E. debile, and E. variegatum are described in 

 detail. That of E. debile is much reduced and forms an irregular loose network. Numerous 

 parenchjTuatous meshes originating below the cone persist for a considerable distance into 

 the cone or throughout its full length. The stele of E. variegatum is also somewhat reduced. 

 The separation of the protoxylem and metaxylem in the internodes of certain species is re- 

 garded as a derivative character due to reduction. A comparative study confirms the view 

 that the meshes arose at points vertically above the sporangiophoric traces, though at a 

 certain height above this level. In certain cases the approximation of the meshes to the 

 point of the departure of the traces is due to reduction of the xylem during phylogeny. The 

 meshes are therefore not true gaps. Evidence is adduced in support of the view that the 

 insertion of the annulus marks the position of a vestigial node. — W. P. Thompson. 



1822. Cutting, E. M. Observations on variations in the flowers of Stachys sylvatica Linn. 

 Ann. Botany 35: 409-426. 5 fig. 1921. — Plants of ^itachys sylvatica were observed showing 



