186 COMPOSITE. ■ [Cotula. 



'Achenes bordered with a narrow caUous witg, especially towards tlie sumrait, 

 ^Pleiogyne antJiemoides, C. Kocli, in Bot. Zeit. 1843, col. 40. P-_eArdU)- 

 sperma, Edg. in Linn. Trans, xx. 71 ; Benth. in Kew Journ. Bot. iv. 235. 

 Machlis hemispharica, DC. Prod. vi. 140. 



In rice-fields, Champion, Wilford. Common in the plains of N. India, extending west- 

 ward to Egypt and northward to Sikkim and S. China. 



39. MTKIOGYNE, Less. 



All the characters of Cotula, except that the female florets, though veiy mi- 

 nute, have a tubular corolla nearly as long as the style, and the achenes are 

 4-angled and but slightly compressed. 



A small genus, chiefly S. Asiatic and Australian, with one species from extratropical S. 

 America. 



1. M. minuta. Less.; DC. Trod. vi. 139. A prostrate branching annual; 

 the slender somewhat woolly stems a to 3 in. or seldom near 6 in. long. 

 Leaves alternate, oblong, 3 to 5 lines long, narrowed at the base or almost 

 stalked, toothed or almost pinnatifid. Hower-heads about \\ Unes diameter, 

 at iirst terminal, but soon becoming leaf-opposed and sessile. Involucral 

 bracts in about 3 rows, scarious at the edges. Florets very minute, the fe- 

 males very numerous; their corolla scai-cely above a third the length of the 

 ovary. Achenes slightly h^ry.^Centipeda orbicularis, Lour.; Miq. El. Ned. 

 Ind. ii. 89. Spjiaromorphsa centipeda, DC. Prod. vi. 140. 

 ' In rice-flelds, Wilford, Sauce, WrigKt, Very common throughout India, from Ceylon 

 and the Peninsula to the Arctipelago, extending also to Australia and northward to the 

 Philippines, China, and Japan. 



80. AKTEMISIA, Linn, 



Plower-heads heterogamous or rarely homogainous, usually few-flowered. 

 Florets all tubular; those of the circumference female, 8-toothed, in 1 or 3 

 rows or sometimes wanting. Disk-florets hermaphrodite, 5 -toothed. Invo- 

 lucral bracts imbricate, unequal, scarious on the edges. Eeceptacle without 

 scabies. Style-branches in the disk-florets truncate. Achenes obovoid, rounded 

 at the top. Pappus 0. — ^Erect herbs, undershrubs, or shrubs. Leaves alter- 

 nate, usually divided, with narrow segments. Flower-heads usually small, 

 numerous, nodding. 



A large genus, widely spread over the temperate and cold regions of the northern hemi- 

 sphere, biit scarcely penetrating into the tropics. 



Perennials. Involucres ovoid. . Leaves few-lobed. 



• Leaves glabrous, shortly lobed or toothed at the top. Female florets di- 

 lated at the base. Hermaphrodite florets sterile 1. A.japonica. 



■ Leaves white Underneath, With long lobe's. Female florets slender. Her- 

 maphrodite florets fertile ; . . . 2. A. vulgaris. 



Annual. luvolacres globular, very small. Leaves bipinnatifid . . . . 3. ^. annua. 



: 1. A. japouica, TMni.,- DC. Prod. vi. 100. A glabrous erect peren- 

 nial, 1 to 3 ft. high. Leaves mostly cuneate, 1 to 1^ in. long, lobed or 

 toothed at the upper end, narrow and entire at the base; the upper ones 

 small, deeply 3-lobed or entii-e, and linear. Flower-heads ovoid, scarcely 

 more than 1 line long,, in numerous short racemes forming a lono- dense 



