AND GENERA OF PLANTS. 449 



Tribe EuPATORiACEiE. 



*HELOGYNE. 



Capitulum homogamous, many-flowered. Involucrum subcampanulate, imbri- 

 cate; sepals foliaceous, unequal, about eight, the inner scariose. Receptacle 

 naked. Corolla tubular, equal, glandular, the apex shortly five-toothed and 

 closed. Branches of the stigma connivent, clavate, very large, obtusely 

 rounded, exserted, smooth and glutinous. Achenium slenderly obconic, 

 pentangular, smooth, with a basilar cicatrice. Pappus plumose, short, about 

 the length of the achenium; the rays aboiit twenty. — An annual? plant of 

 Peru, hirsutely pubescent and glandular. Leaves alternate, cuneate-oblong, 

 sessile, entire, or toothed at the apex. Capituli terminal, sessile. Flowers 

 whitish, or ochroleucous. It appears to have some affinity with Agrian- 

 thus, but the aspect of the involucrum is that of Apalus. It is bitter to the 

 taste. — (The name from YfXoSj a nail, or stud, and yw^, a female; in allusion 

 to the remarkable form of the stigma.) 



Helogyne * Apaloidea. 



Hab. In Peru, towards Arequipa; (Mr. Curson.) My specimen is only a branch, covered, as 

 well as the leaves, with short scaly hairs, more or less glutinous: many of the leaves are entire, a 

 few of the larger have a blunt tooth on either side, towards the summit. Capituli fastigiate, ter- 

 minal, and sessile, rather large, about twelve-flowered. Involucrum of about eight leaves, four or 

 five larger, external, oblong, or oblong-ovate, very similar to the leaves, and equally pubescent, 

 the inner narrower and scariose or membranous, all rather obtuse. Eeceptacle small. Corolla 

 slenderly and equally tubular, glandular, about twice the length of the pappus; the teeth of the 

 border very shallow and obtuse. Anthers small and closely included, not bisetose. Stigmas very 

 large and conspicuous, brownish and glutinous, the extremities rounded in a clavate form, each 

 summit wider than the whole corolla. 



Tribe ASTEROIDEtE. 



Subtribe Baccharide^. — Division Conyze^. 

 *PARASTREPHIA. 



Capitulum many-flowered, heterogamous; the radial five-toothed tubular 

 florets masculine! discal florets filiform, oblique, two-toothed, feminine. 

 Stigmas equally filiform, exserted. Involucrum imbricated in about two 



VII.— 5 N 



