PROF. OLIVER ON NKW PLANTS FROM RORAIMA. 297 



quite obsolete. Besides these there are several other remarkable South- American species : 

 A. alata, Gottschc, from Chili, a very large species ; A. prehensilis, Hook. f. et Tayl. Fl. 

 Ant. t. 1G0. fig. 9 (under Jungermannia) , originally from Ilermite Island, since collected 

 by Cunningham, with stems nearly six inches high, and always with its pruinose look 

 when dry ; A. polyclada, Mitt., gathered in Otway Harbour, Patagonia, during the visit 

 of the 'Challenger' Expedition, a small species about an inch and a half high (frons 

 dorso planus hcvis, ramis valde approximates bipinnatis, ventre ramulis curvulis crispulis 

 telam spongiosam formantibus, margine ubique limbo e cellularum 3-4 lato pellucidiore di- 

 stincto) ; A.pohjpteru, Mitt., from Magellan, collected in Cockle Cove by Dr. Coppinger, 

 H.M.S. 'Alert' (frons 10 cm. alt., 2 cm. lat., ramis approximatis tripinnatis ubique 

 lamina 5-6 cell, lata, limbatus dorso planus laevis ventre prsecipue in ramis ramulisque 

 lamellis angustis longitudinalibus vestitus) ; and A. denticulata, Mitt., from the Andes 

 of Bogota, gathered amongst mosses by Weir (frons 5-6 cm. altus cum ramulis 1 cm. 

 latus, ramis remotiusculis bipinnatis ubique limbo pellucidiore cell. 4 lato margine 

 denticulis divaricatis angustis subciliatus). All these species show that in South America 

 there is a development of larger forms than are yet known elsewhere. 



Blepharozia PlORAIM^e. Polia erecto-patentia imbricata, cochleariformi-concava inte- 

 gerrima e lobulato obtusa ; involucralia conformia, perianthia (abortiva) cylindracea 

 abrupta obtusissima, ore parvo rotundo. 



Prom the top of Roraima, one stem only. 



Entire plant of a dark red-brown colour, about 4 cm. high ; it is divided below into two, 

 one branch being again forked, the leaves are imbricated in bifarious order and are 

 repeatedly in interrupted series ; each innovation arises from towards one side of the 

 dorsal base of the perianth with small leaves, which increase rapidly in size upwards, the 

 largest being the involucral, here the greatest diameter is about 4 mm. : the perianths 

 are also about 4 mm. long, and of these as many as four are observable on the undivided 

 stem, and as each innovation arises from the same position, they stand at the side of the 

 stem rather towards the ventral side ; in all particulars they closely resemble the abor- 

 tive perianths seen on B. sphagnoides and other species ; the young innovation also 

 closely agrees with that of the male amenta of that species ; but there is no trace of the 

 lobule, which is not, as has been supposed, distinct from the leaf in B. cochlear if ormis, but 

 is seen, from being an almost closed sac in some species, to be opened out in B. ecoluta. 



DESCRIPTION OF THE PLATES. 

 Plate XXXVII. 



Figs. 1-8. (A.) Leitgebia Imthurniana, Oliver, sp. n. 1, plant in flower; 2, leaf; 3, pedicel and calyx; 



4, bract ; 5, corona ; 6, two stamens and segment of corona ; 7, pistil ; 8, transverse section of 



ovary. 

 Figs. 9-17. (B.) Bonnetia Roraima, Oliver, sp. n. 9, plant in flower ; 10, leaf ; 11, flower; 12, calyx ; 



13, petal; 14, phalange of stamens; 15, a back and front view of stamen ; 1G, pistil ; 17, 



transverse section of ovary. 

 Figs. 1 and 9 reduced sketches, fig. 8 nat. size ; all the other figures enlarged. 

 SECOND SERIES. — BOTANY, VOL. II. '- V 



