ROSACEiE. 175 



alternate, pinnate or palmate, rarely simple or undivided, sti- 

 pulate. Flowers perfect, in more or less regular cymes, or in 

 corymbs. Calyx not attached to the ovary, persistent, rarely 

 withering. Sepals 5, rarely 4, united below, often stipulate (the 

 stipules in this case unite and form a calycule, or secondary or 

 exterior calyx). Petals 5, rarely 4, caducous on a disc, imbri- 

 cated like the sepals in prefloration. Stamens indefinite. Anthers 

 introrse. Ovary free, consisting of an indefinite number of car- 

 pels, rarely few (one or two) . Carpels with one ovule in each, 

 rarely with two or several ovules. Ovules suspended or erect. 

 Styles as many as the carpels, lateral, rarely terminal, free, rarely 

 agglutinated in a column. Stigmas undivided. Fruit consisting 

 of distinct carpels, usually indefinite, rarely few ; carpels dry or 

 drupaceous, one-seeded, not opening (many-seeded and opening 

 in Spiraa), usually disposed in a head or on a hemsipherical or 

 conical receptacle, rarely enclosed in the fleshy or ligneous tube 

 of the calyx. Seeds suspended or erect, without albumen (peri- 

 sperm). Embryo straight. Radicle directed towards the liilum. 



Tribe I. SPIRjSHJ^. — Carpels few, each 2-6-seeded, in a single whorl, 

 opening by the inner margin (the border nearest the axis or centre 

 of the flower). 

 Genus. — Spib^a. 



Tribe II. FOTENTILLEJE. — Carpels numerous, each one-seeded, 

 not opening, either dry or succulent (drupaceous), on a dry or 

 fleshy hemispherical or conical receptacle. 



STNOPSIS OF THE GENEEA. 



PoTENTiiLA. — Carpels numerous, small ; uuts on a flattish dry receptacle. 

 FEAaAElA. — Carpels on a largely AcveXoyjiQA fleshy-succulent receptacle. 

 E-UBTJS. — Carpels drnpaceoiis, succulent, on a conical persistent receptacle. 

 Drtas. — Calyx and petals 8-9 respectively ; carpels on a dry receptacle. 

 Geum. — Petals 5 ; carpels tipped with the jointed styles, on a dry receptacle. 



Tribe III. ROSEM. 



Genus. — Spie^a. 



Tribe IV. 5^iV(?Z7/.SOiEJ5^^.— Stamens definite; carpels 1-2, 

 rarely more, contained in the cup of the indurated calyx. 



SYNOPSIS OF THE GENEEA. 



Ageimonia. — Calyx 5-cleft, tubular, with hooked bristles ; carpels 2, en- 

 closed in the cup of the calyx. 



Sanguisoeba. — Calyx -t-cleft ; no petals ; stamens 4 ; carpels 3, included in 

 the di*y tube of the calyx. 



