MALVACEAE. 177 



culatis; involucelli phyllis 5-7 parvis deciduis; fetalis (rubris) ob- 

 longis basi attenuatis atque in tubum gracilem calyce cylindrico lon- 

 giorem coalitis; columna staminea prcelonga spithamcea; capsida 

 polysperma. 



Hibiscus Arnottianus, Gray, in herb. Hook, anno 1837. 



H. Boryanus, Hook. & Arn. Bot. Beech. Voy. p. 79, non DC. 



Hab. Sandwich Islands; on the Kaala Mountains behind Honolulu, 

 Oahu; where it was also gathered by Macrae, Lay and Collie, Diell, 

 Barclay, &c. (Byron's Bay, Hawaii, Macrae, Diell.) 



A shrubby species, several feet in height, glabrous throughout, espe- 

 cially the leaves. Leaves ovate or oval, mostly obtuse, rounded or 

 sometimes slightly contracted at the base, where they are three-nerved, 

 or obscurely five-nerved, chartaceous or somewhat coriaceous in texture, 

 entire (rarely a little toothed, at least in Hawaiian specimens) green, 

 and of the same hue both sides, 2 J to 4 inches long; the petioles an 

 inch or an inch and a half in length. Stipules subulate, caducous. 

 Flowers solitary, terminating the branches, or in the uppermost axils, 

 peduncled; the peduncle 6 to 12 lines, or even 2 inches in length, 

 articulated towards the summit. Involucel very much shorter than 

 the calyx, of 5 to 7 lanceolate or subulate and entire leaflets, only 2 

 or 3 lines long, more or less deciduous. Calyx cylindrical or tubular, 

 two-thirds of an inch in length, membranaceous, not inflated, rather 

 deeply five-toothed at the apex (the teeth triangular, puberulent 

 within), glabrous externally, inclining to split down one side with 

 age, but not in a regular manner. Corolla red or deep rose-colour; 

 the ■petals oblong, or narrowly obovate, 2i inches long, apparently 

 ascending, narrowed at the base, and united into a slender tube, of 

 nearly an inch in length, which is exserted beyond the calyx. Stami- 

 neal column very long (5 or 6 inches in length), slender, erect, or 

 perhaps declined, the upper half exserted beyond the corolla and 

 copiously antheriferous : the filaments capillary, nearly an inch long, 

 puberulent. Style five-cleft at the apex. Stigmas capitate. Ovary 

 five-celled, oblong, glabrous. Ovules numerous in each cell, biserial, 

 glabrous. 



This plant was referred by Hooker and Arnott to Hibiscus Bory- 

 anus, DC. ; a native of the Isle of Bourbon, which is described as 



45 



