No. 1, August, 1920] MORPHOLOGY, ETC., VASC. PLANTS 73 



• 



The author points out thai protoplasm ami nuclei occur in the Laticiferous vessels, bul that 

 the nuclei arc larger than those of other cm-lex cells. Both nuclei and vacuoles occur in the 

 protoplasm where they can be seen after the caoutchouc has been dissolved out. Therefore 

 the latex of ll,uea is probably cell-sap, which generally occurs in the vacuoles of the laticifer- 

 ous vessels. Sometimes many of the nuclei of laticiferous • ' unite in one place, l.cnce 

 it seems thai the nuclei have the faculty of moving. Author also observes that the nuclei 

 pass from one vessel into another through the wall openings. — W. E. Cake. 



547. BuRQERSTElN, A. Beitrage zur Naturgeschichte der Scoglien und Kleineren Inseln 

 Siiddalmatiens. 8. Anatomische Beschreibung des Holzes einiger Straucher und Halb- 

 straucher. [The natural history of the smaller islands of southern Dalmatia. 8. Anatomical 

 description of the wood of some shrubs and undershrubs.] Denkschr. K. Akad. Wiss. W'ien. 



ith.-Nat. Kl.) 92: 329-331. 191G. 



~>i<. Chirtoiu, Marie. Remarques sur le Symplocos Klotzschii et les affinites des Sym- 

 plocacees. [Remarks on Symplocos Klotzschii and the affinities of the Symplocaceae.] Bull. 

 Soc. Bot. Geneve 10: 350-361. 5 fig. 1918. 



549. Chirtoiu, Marie. Observations sur les Lacisteme et la situation systematique de 

 ce senre. [Observations on the species of Lacistema and the systematic position of this genus.] 

 Bull. Soc. Bot. Geneve 10: 317-349. 18 fig. 1918. 



550. Clute, Willard N. Peloria. Amer. Bot. 25: 148. 1919. 



551. Coulter, J. M. Perennating fruit of Cactaceae. [Rev. of: Johnson*, Duncan* S. 

 The fruit of Opuntia fulgida. A study of perennation and proliferation in the fruits of certain 

 Cactaceae. Carnegie Inst, Publ. 269. 62 p., 12 pi. 1918.] Bot. Gaz. 68: 151. 1919. 



552. Coulter, J. M. Root-nodules. [Rev. of: Spratt, Ethel R. A comparative ac- 

 count of the root-nodules of the Leguminosae. Ann. Botany 33 : 189-199. 5 fig. 1919. (See 

 Bot. Absts. 3, Entry 1139.)] Bot. Gaz. 68: 311. 1919. 



553. Coulter, J. M. Suspensor of trapa. [Rev. of: Tison, A. Sur le suspenseur du 

 Trapa natans L. Rev. Gen. Bot. 31 : 219-228. 5 fig. 1919. (See Bot. xVbsts. 3, Entry 2451.)] 

 Bot. Gaz. 68:312. 1919. 



554. Cremata, Merlino. Un fenomeno curioso. [A curiosity.] Revist. Agric. Com. y 

 Trab. 2 : 509. 2 jig. 1919. — Several cases are cited where the royal palm has become branched. 

 — F. M. Blodgett. 



555. Dixon, Henry H. Mahogany and the recognition of some of the different kinds by 

 their microscopic characters. Sci. Proc. Roy. Soc. London 15: 431-4S6. 22 pi. 1918. 



556. Eberstaller, Robert. Beitrage zur Vergleichenden Anatomie der Narcisseae. 

 [Comparative anatomy of Narcissus.] Denkschr. K. Akad. Wiss. Wien. (Math. -Nat. Kl.) 

 92:87-105. S pi. 1916. 



557. Esmarch. Uber den Wundverschluss bei geschnittenen Saatkartoffeln. [Wound 

 healing in cut seed potatoes.] Fiihl. Landw. Zeit. 67: 253-256. 1918. — True periderm forma- 

 tion on the exposed surfaces of cut seed potatoes takes place only, and most rapidly, when 

 the tubers are kept in a fairly moist place. The practice of leaving the cut tubers to dry in 

 the air results only in the drying in of the upper cell layers which may be accompanied by a 

 suberization of the walls. It is questionable whether a crust formed in such a way affords 

 real protection against parasitic bacteria and fungi. — Emsl Artschwager. 



