PUAXEROGAMIA. 113 



labellum. Differences presented by the spur, its relative length, &c, 

 are but slight in 0. Tenor eana ; in some other species, as 0. iiiorio, 

 the spur is very variable in form. The author considers, with Koch, 

 Orchis tridentata, Scop., and 0. variegata, All., to be specifically 

 identical. 0. Tenoreana, Gu^s., he regards as distinct. 

 Tomaschek, A. — Ueber die Eutwickehrngsiahigkeit der Bliithenkritzchen 

 von Cor gifts avellana, L. — Verhdlgn. K. X. Z.-B. Gesollsehft. in 

 Wien. Bd. ix., pp. 3-6. 



Nachtrag zur Phanerogamen-Flora Cylli's. — lb. Bd. ix., pp. 



35-42. 



Zur Flora der Uingebung Lembergs. — lb. Bd. ix., pp. 43-54. 



Considerations upon the relations of the vegetation to the cha- 

 racter of the soil, and to meteorological conditions. 



Treviraxtjs, L C. — TJeber den Wechsel des Griinen und Rothen in 

 der Lebensaften belebter Korper. — Eot. Zeit. 1860, pp. 281-8. 



The author's observations apply, in the vegetable kingdom, 

 chiefly to the red coloration of Alga3, Lichens, and autumnal leaves. 



Uloth, W. — Beitrage zur Physiologie der Cuscuteen. With 2 plates. — 

 Flora, 1860, pp. 257-68, 273-81. 



The structure of the seed, its germination, the connexion between 

 the parasite and its prey, &c, are minutely described. The author 

 finds the embryo in Cuscuta compact a, vulgivaga, chilensis, and Ce- 

 phalanti (referred by him to Cuscutina of Pfeiffer), to bear minute 

 scale-like organs on its summit. 



The active growth and increase of the parasite commences with 

 the formation of vascular tissue in the first cord of tissue penetrating 

 the epidermal layers of its prey. When these " suckers" penetrate 

 any part of the parasite itself, as frequently occurs, no formation of 

 vessels takes place. M. Chatin's account (Anat. Comp. des Veget., 

 Livr. iii.) of the parasitism of Cuscuta, and his elaborate drawings, 

 appear to be unknown to the author. 



Tornabene, F. — Monografia delle specie di Asparagus spontanee sulT 

 Etna. 4to. Catania. 6 plates. 



Sopra un nuovo albero indigeno sull' Etna del genere Celt is. — 



Catania. 4to. 



Walpers. — Annales Botanices Systematica?. Tom. v., Fasc. vi. From 

 Taxinese to end of Monocotyledons ; with Index to the volume. 



Wawra, H. and J. Peyritsch. — Sertum Benguelense. Aufzahlung 

 und Beschreibung der auf der Expeditionsfahrt Sr. M. Corvette 

 " Carolina" an der Kuste von Benguela von Dr. H. Wawra gesam- 

 melten Pflanzen. Wien, 1860. (Wien Ber. Vol. xxxviii.) 46 pp'. 

 The " Carolina" touched at Benguela on the return voyage from 

 the Cape, remaining but six days (from 21st to 28th January). On 

 two excursions, made under very unfavourable circumstances, Dr. 

 W. collected 53 species, of which he finds about half to be unde- 

 scribed. A short account of the town of Benguela, the vegetation of 

 its neighbourhood, and of the Benguelese, is prefixed to the list of 

 species met with. This latter includes diagnoses and lengthened 



VOL. I — N. H. R. Q 



