On the Structure and Habits of the OrobancliaceEe. 29 



Spha?ria concentrica. Ustilago Sal veil, Berk. MSS. On 



Myriangium Duriaei, Berk. Sf Mont. young plants of Dactylon glonie- 



On ash-trees in Sark. ratus. St. Martin's. 



Phonia asteriscus. On Herucleum in Uredo compransor. 



Moulin Huet Bay. Petroselini. On Sium lati- 



Dothidea ulmi. folium. 



rubra. caricina. On Cyperus lougus. 



Lycoperdon gemniatuni ; e, fuvfura- bit'rons. On Rumex obtusifo- 



ceum. lilts. 



Scleroderma vulgare, ranunculacearum. 



Erysi])lie communis. vubigo. 



Oidium moniloides. cylindrospora. 



Aregma bulbosum. polygonorum. 



Puccinia graminis. Kosse. 



polygonorum. capreannn. 



lychnidearum. leguminosarum. 



Cotyledonis. Candida. On Lepidiiini lalifo' 



violarum. liir/ii. Grand Cobo. 



Fabte. primulse. 



prunorum. hypericorum. 



iEcidium Bunii. trifolii, Dec. apiculosa, /J-. On 



laceratum. Medicago denticidala. 



primulte. . On Lotus hispidus. 



rubellum. . On pea leaves — not ap- 



ranunculacearum. pendiculot\a — a very hand- 



Periclymeni. FermaiuBay. some species. 



Depazea Carica". On the leaves of Scillarum. 

 the conmion fig-tree. Berk. MSS. 



IV. — On the Structure and Habits of the Orobanchacese. 

 By Arthur Henfrey, F.L.S. 



The discovery by Mr. Mitten of the parasitism of Thesium, and 

 the extension of the same character among the Rhinanthacese 

 pointed out by M. Decaisne^ have given additional interest to the 

 study of parasitical plants, and I take advantage of an opportu- 

 nity I had last summer of examining our two common species of 

 Orobanche, rapurn, Thuill., and minor, Sutt., to call attention to 

 some points connected with their structure and mode of growth 

 which do not appear to have been noticed. 



M. Duchartre published in the 'Ann. des Sc. nat.' Sept. 1843, 

 an account of the anatomy oi Lathrcca clandestiva, Linn., and in 

 the 'Ann. des Sc. nat.' Aug. 1845 of Orobanche Ei-yngii, Vauch. ; 

 and in the 'Ann. des Sciences nat.' for Sept. 1847, M. Lory 

 relates the results of his observations on the structure and phy- 

 siology of Orobanche Teucrii, Holl et Schultz., Galii, Duby, 

 major, L., brachysepala, Schultz., and cruenta, Bert., which, as 

 far as they go, agree with what I have noticed in Orobanche 

 rapum and minor. 



The stems of these plants present in a cross section a very 



