336 



Lindleifs Sertum Orchidaceum. 



and, in the present case, 

 it serves as a roof to 

 the mushroom-house. 

 In the centre of each 

 vault, shown inyfg. 72., 

 a circular ventilator, 9 

 in. in diameter, will be 

 made, having a stone or 

 cast-iron stopper, with 

 a folding ring. 



Cast iron shelves are 

 objectionable ill mush- 

 room-houses, on ac- 

 count of the rust; and so are slate shelves, they being generally 

 cold and damp, and, therefore, not suitable to the purpose ; but 

 I know of no objection to shelves built of bricks and mortar, 

 and kerbed with hewn stone 3 in. wide, batted together with 

 lead. Shelves have been executed in this manner at the seat of 

 Sir Simon Clarke, East Barnet. 



Isleworth, Dec. 26. 1836. 



REVIEWS. 



Art. I. Sertum Orchidaceum; a Wreaih of the most beautiful Or- 

 chidaceous Flowers. Selected by John Lindley, Ph.D. F.R.S., &c. 

 Parts III. and IV. Folio. 



The first and second parts of this splendid work have been noticed in our 

 preceding volume (p. 148. and 287.); and the two before us maintain the high 

 character of this publication, which we have before given. 



Part III. commences with plate 11., a drawing combining singularity and 

 beauty in an eminent degree. It represents three plants of Leptotes serrulata 

 on a portion of the trunk of a cedrela tree. " This charming plant is especially 

 remarkable for the sweet odour of the lilac which its flowers exhale. It is 

 found in blossom in the month of December, on the trunk of cedrela trees, in 

 the ancient Rocas of Brazil, where, without any sign of suffering, it survives 

 the conflagrations that destroy so many other plants. The stems are cylin- 

 drical, creeping, and covered with a sort of dry smooth membrane, of a silvery 

 whiteness, which spreads over a portion of the base of each leaf. The leaves are 

 cylindrical, thick, succulent, fusiform, deeply channelled on the upper side, 

 glaucous green or bluish, and dotted with violet purple, especially underneath. 

 The flower-buds are of a yellowish rose colour, protuberant at their base. 

 The flower is very large and stellate; the sepals are riband-shaped, rather 

 broad, and white as the purest enamel j the petals narrower and thinner, but 

 equally white. The lip has at its base two short rounded auricles ; otherwise, 

 it is strap-shaped at the base, with a white centre, whence there radiate nume- 

 rous lines of the most brilliant lilac, and is afterwards dilated into an ovate 

 pointed or lanceolate limb of a beautiful white." 



Plate 12. is Cyrtopodium punctatum, already figured in the Botanical Ma- 

 gazine, and, consequently, included in our Floricultural Notices. The figure 

 in the Botanical Magazine, however, Dr. Lindley observes, " seems to have 

 been taken from a bleached specimen." Plate 13. is Sehomburgk?'« marginata, 

 a Surinam species, from a drawing made in that colony, under the direction of 



