of the Hammersmith Nursery, where our sample flowered 

 this summer in the hothouse. 



It was found at Vera Cruz by Dr. Houstoun, by Aublet 

 in Guiana ; and lastly by Messrs. Humboldt and Bonpland 

 in the vallies of Aragua at the height of 240 fathom above 

 the level of the sea, and in the province of Popayan at the 

 height of 500 fathoms. 



The order Hydroleas was detached from Comjolvulacece 

 by Mr. Brown ; differing by the absence of the remarkable 

 wrinkles that distinguish the seedlobes of the latter, and 

 the presence of which has been found by that eminent bota- 

 nist constantly to announce a fruit with a small and limited 

 number of seed, while its absence in the Hydrolece (in truth 

 more closely allied to Polemoniaceae) announces a fruit with 

 an indefinite number of seed. But besides the above tech- 

 nical diflFerences, the habits of the two orders are very dis- 

 tinct. 



A subshrubby thorny plant, with a clammy far ; thorns 

 axillary. Leaves alternate, entire. Flowers both terminal 

 and axillary, imbricately folded before expansion. Calyx 

 deeply 5-(seldom 6) parted, farred on the outside; hairs 

 transparent and jointed; segments lanceolate, pointed, en- 

 tire, slightly uneven, 1-nerved, green. Corolla campanu- 

 lately rotate, smooth, overtopping the calyx ; tube short, 

 fannelled ; limb 5-parted, spreading, segments roundishly 

 ovate, obtuse, entire, even, with fanwisely disposed veins. 

 Stamens inserted at the middle of the tube, shorter than 

 the corolla, even ; filaments linearly subulate, membranous, 

 smooth, widened at the base ; anthers fixed on at the back, 

 balanced, oblongly linear, obtuse, sagittately bifid at the 

 base, 2-celled, bursting longitudinally. Germen oblongs 

 slightly furred at the top, placed upon an orbicular entire 

 smooth disk (fleshy bzisement) : styles 2 (sometimes 3) the 

 length of the stamens, filiform, smooth, blue; stigmas thick- 

 ened slantingly truncated. Fhtrn the latin of M. KuntK 



