450 NA TUBAL HISTORY OF PLANTS. 



ovary 1 -celled ; style terminal exserted, apex capitate stigmatiferous ; 

 ovule solitary descending ; micropyle superior extrorse. Achenes 

 1-3, 1 -seeded, included in hardened, often aculeate burr-like recep- 

 tacle. Seeds exalbuminous ; embryo fleshy, radicle superior. — 

 Perennial herbs ; leaves alternate imparipinnate ; stipules adnate to 

 base of petiole ; flowers in terminal or axillary racemes ; pedicels 

 bracteolate ; bracts rarely [Aremonia) connate into a multifid infundi- 

 buliform involucre under the unarmed flower. {Temperate regions of 

 Northern Hemisphere and South America.) See p. 389. 



3. Leucosidea Eckl. & Zeyh. — Flowers hermaphrodite 5-6- 

 merous ; receptacle obconical (of Agrimonia), glabrous outside, lined 

 by a disk with a thickened mouth. Calyx valvate, with 5-6 

 alternisepalous stipulaceous leaves (of calycle) outside. Petals 

 short caducous. Stamens 10-12; anthers introrse {oi Agrimonia), 

 thickened and glandular on back. Carpels 2-4 and ovules of Agri- 

 monia. Achenes 1-4, 1 -seeded, included in glabrous subosseous 

 receptacle. — A silky- villous shrub ; leaves alternate imparipinnate ; 

 stipules adnate to sheathing base of petiole ; flowers 2-bracteolate in 

 terminal spikes. [Cape of Good Hope.) See p. 343. 



4. Brayera K. — Flowers polygamo-dicecious, 4-5-merous ; recep- 

 tacle turbinate ; throat narrowed by a more or less prominent mem- 

 branous ring. Calyx persistent ; sepals membranous veined, shorter 

 than exterior alternating bractlets (of cal3^cle). Petals linear or very 

 short obtuse, more rarely 0. Stamens not exceeding 20 (of the 

 Rosacea), free, inserted in throat of receptacle, in female flowers 

 small sterile. Carpels 2, 3 ; styles terminal, apex widely-dilated 

 stigmatiferous. Ovule solitary descending ; micropyle superior ex- 

 trorse. Fruit ? . . . . — A tall tree ; leaves alternate crowded inter- 

 ruptipinnate ; stipules large adnate for some distance to petiole ; 

 flowers very numerous crowded axillary racemoso-cymose ; ramifi- 

 cations axillary to leafy bracts ; 1-4 membranous bracts at base of 

 flowers. {Mountain districts of Abgssinia.) See p. 343. 



5. Alchemilla T. — Flowers hermaphrodite 4-5-merous, apetalous ; 

 receptacle urceolate, constricted in throat. Sepals valvate ; outer 

 leaves (of calycle) as many, alternating smaller. Stamens 1-5, alter- 

 nating with sepals, inserted on throat of receptacle ; filaments free, 



