On the Structure and Habits of the Orobanchacez. 
Spheeria concentrica. 
yriangium Duriei, Berk. § Mont. 
On ash-trees in Sark. 
Phoma asteriscus. On Heracleum in 
Moulin Huet Bay. 
Dothidea ulmi. 
rubra. 
Lycoperdon gemmatum ; e. furfura- 
ceum. 
- Scleroderma vulgare. 
Erysiphe communis. 
Oidium moniloides. 
Aregma bulbosum. 
Puccinia graminis. 
polygonorum, 
lychnidearum. 
Cotyledonis. 
violarum. 
Fabe. 
prunorum. 
Ecidium Bunii. 
laceratum. 
primulee. 
rubellum. 
ranunculacearum. 
Periclymeni. Fermain Bay. 
Depazea Carice. On the leaves of 
the common fig-tree. Berk. MSS. 
29 
Ustilago Salveii, Berk. MSS. On 
young plants of Dactylon glome- 
ratus. St. Martin’s. 
Uredo compransor. 
Petroselini. 
folium. 
caricina. On Cyperus longus. 
bifrons. On Rumea obtusifo- 
lius. 
ranunculacearum. 
rubigo. 
cylindrospora. 
polygonorum. 
Rose. 
caprearum. 
leguminosarum. 
candida. On Lepidium latifo- 
lium. Grand Cobo. 
primule. 
hypericorum. 
trifolii, Dec. apiculosa, Lk. On 
Medicago denticulata. 
On Lotus hispidus. 
. On pea leaves—not ap- 
pendiculosa—a very hand- 
some species. 
Scillarum. 
On Sium lati- 
aes. eet Sr * r FO TE Sve eae OF s ta ote ‘a3 = J ae 
bs a, sth) ae odes ™ iS SS MeN Pe [FC ‘pod | eS Maat 
4 i é ‘ihe - a ee 
4 
ae 
IV.—On the Structure and Habits of the Orobanchacez. 
By Artuur Henrrey, F.L.S. 
Tue discovery by Mr. Mitten of the parasitism of Thesium, and 
the extension of the same character among the Rhinanthaceze 
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, rapum, 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 of Lathrea clandestina, Linn., and in 
the ‘ Ann. des Sc. nat.’ Aug. 1845 of Orobanche Eryngit, Vauch. ; 
and in the ‘Ann. des Sciences nat.’ for Sept. 1847, M. Lory 
relates the results of his observations on the structure and phy- 
slology of Orobanche Teucrii, Holl et Schultz., Gali, 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 
