78 NEW COMPOSITiB FROM MONTE VIDEO. 



EupATORiUM (Campuloclinium) Arechavaletje, Baker, n. sp. 

 A robust erect perennial, three feet high. Stem imbranched below 

 the mflorescence, stout, sulcate, slightly pubescent. Leaves few, 

 alternate, sessile, four to eight inches long, half to an inch broad 

 at the middle, entire or obscurely serrulate, moderately firm in 

 texture, sHghtly pubescent and scabrous on both surfaces. Heads 

 six to twenty in a terminal corymb ; the upper foot of the stem 

 nearly naked ; the bracts linear and minute ; the branches rough 

 with short bristly hairs ; some of the heads sessile in the centre 

 x/ of the forks, the side ones on curved ascending peduncles three- 

 fourths to an inch long. Heads containing fifty flowers or more ; 

 the campanulate involucre half an inch in diameter and one-third 

 of an mch long ; the large, pauciserial, obtuse, oblong-lanceolate, 

 closely adjDressed scales, with a green many-nerved keel and a 

 broad membranous border (white with a red tinge) all round it. 

 Receptacle glabrous, alveolate. Achene seen immature only; 

 pappus one-fourth of an inch long, of very numerous white 

 bristles. Corolla bright purple, its tube as long as the pappus, 

 and the linear segments one-third- as long as the tube. Style- 

 arms protruded, subulate. 



Monte Video, in damp soil, Arechavaleta, 4172 ! 4173 ! 



There are only two species of Camjndoclinium with alternate 

 leaves already known, from both of which this recedes widely. 



STENAcmENiuM RiEDELH, Baker, n, sp. An erect perennial 

 herb, three to four feet high, with stem, leaves and involucre 

 densely clothed with soft, spreading, white, silky hairs. Leaves 

 mainly in a radical rosette, sessile, oblanceolate-oblong, six to ten 

 inches long, crenato-repand principally in the upper half, narrowed 

 gradually from the middle to the base, moderately firm in texture, 

 strongly nerved on the under side. Stem winged through the 

 lower half, its leaves few and very much reduced in size as com- 

 pared with those of the radical rosette. Heads six to eight, at the 

 end of long, densely silky, ascending peduncles, containing niany 

 i hundred flowers each. Involucre campanulate, more than an inch 



^ in diameter, three-fourths of an inch long ; the multiserial, closely 



imbricated, linear scales densely plumose. Many outer rows of 

 flowers imperfect, composed of a glabrous achene one-eighth of an 

 inch long, a pappus half an inch long, of very numerous brownish 

 flexuose setae, and a filiform corolla as long as the pappus, mi- 

 nutely lobed at the very top. Many inner rows of flowers perfect, 

 with a similar achene and pappus, but a much stouter cylindrical 

 corolla, more deeply lobed, and purple at the top, containing both 

 a style and anthers. 



Monte Video, m damp soil, Arechavaleta, 4029 ! 



This is the unnamed species of Stenachenium mentioned by 

 Mr. Bentham in * Genera Plantarum ' as havmg been gathered 

 by Riedel. With its large radical rosette of leaves and densely 

 silky stems, and very numerous flowers, packed in dense silky 

 heads as large as, say, those of Cardnus nutans, it is a very striking 

 jjlant. 



