83 



ONOSMA SETOSUM. 



(Bristly Onosma.} 



LINNEAN SYSTEM. __ „ „ „ NATUEAL ORDER. 



No. 111. 



PENTANDRIA MONOGYNTA. BORA GIN AC E^E. 



GENERIC CHARACTER. 



Onosma. (Linn.) Achenia 4 distincta, lapidea, basi imperforata. Calyx 5 partitus. Corolla 

 tubulosa, clavata, fauce pervia. Antherce sagittate, basi lobis nexse. 



Achenia 4, distinct, of a hard stony nature, imperforated at the base. Calyx divided into 5 

 parts. Corolla tubular, clavate, throat not closed. Anthers arrow-shaped, having the lobes at 

 the base joined. 



SPECIFIC CHARACTER. 

 O. setosum ; tuberculato-hispidum ; setis patentissimis ; caule ramosa ; foliis lineari-lanceo- 

 latis ad costam hispidis ; floribus luteis sub-glabris ; stylis exsertis ; acheniis reticulato-rugosis. 



Tubercular-hispid ; bristles spreading ; stem branched j leaves linear-lanceolate, hispid on the 

 mid-rib ; flowers yellow, somewhat smooth ; style projecting ; seeds reticulately rough. 



Onosma setosum. — Led. i. e. Flor. Alt. t. 196. Page 27, in the same volume. — Flor. altaica, 

 vol. i. p. 181. 



Descr. — Stem about a foot high, round, branched, covered over with strongish hairs. Leaves 

 sessile, linear-lanceolate, acute, scattered. Flowers yellow, numerous, arranged in a circinate 

 manner before flowering, somewhat smooth. Calyx divided into five parts, each part alternate 

 with the teeth of the corolla ; lobes linear-acute. Corolla gamopetalous, five-toothed, teeth obtuse, 

 reflexed at the apex, one fourth as long again as the calyx. Stamens five, broad, flat, adhering to 

 the tube of the corolla, and nearly as long. Anthers brown, linear, having a transparent mem- 

 branous apex, incumbent, two-celled, cells arranged side by side, dehiscing internally by a longi- 

 tudinal slit from the base to the apex, each cell of the anther joined with each other at the base, 

 and thus giving to the base of the anthers a forked appearance when arranged in the corolla. 

 Style longer than the corolla, smooth bifid at the apex. Achenia quadrangular. 



A new and exceedingly pretty species of Onosma : which, according to Lede- 

 bour, is allied to O. Echioides and tinctorium, but differing from them in the form 

 of the achenia and the size of the flowers. 



It is also allied to O. Gmelini, but from that it is distinguished by its branched 

 stem, and by having the anthers included, not exserted, as well as by the deeper 

 colour of the flowers. 



This plant is growing in the Birmingham Botanic Garden, where it was raised 



m 2 



