UMBELLIFER^. 261 



Order XLVIII. UMBELLIFERiE. Juss. The Umbelliferous Tribe. 



Calyx adherent to the ovary ; the limb very small, 5-toothecl or entire. Petals 

 6, usually inflexed at the point. Stamens 5, inserted with the petals on the 

 margin of a disk which crowns the ovary. Ovary composed of two united 

 carpels, invested with the calyx, 2-celled, with a solitary suspended anatropous 

 ovule in each cell : styles 2, their bases often united and thickened (forming a 

 stylopodium). Fruit dry, consisting of 2 indehiscent carpels (mericarps) which 

 adhere by their faces (commissure), and also to a common axis (carpophore) ; 

 at maturity separating from each other, and usually likewise from the axis, at 

 the summit of which they are suspended. Carpels marked by several ribs or 

 wings : in the intervening spaces (intervah) are lodged longitudinal canals or 

 receptacles (vittce)* filled with a colored volatile oil or turpentine ; the vittae 

 are sometimes placed opposite the ribs, and in the commissure. Seeds usually 

 cohering with the carpel. Embryo minute, at the base of copious fleshy or 

 horny albumen. — Herbs, with hollow stems. Leaves mostly alternate, and 

 pinnately or ternately divided ; the petioles dilated and sheathing at the base. 

 Flowers in umbels, commonly with involucres. 



CONSPECTUS OF THE SECTIONS AND TRIBES. 



Series 1. ORTHOSPERM^, DC. Mhumen fiat or flMish mi the face. 

 » Umbels simple or impcifcdhj aympound, joilh the parlial umbels capilaXe. 

 Tribe I. HYDROCOTYLEi;. Fruit laterally compressed. 

 Tribe II. SiNicuLE^. Fruit ovoid-globose. 



** Umbels compound ; the rays more or less elongated : partial umbek ncl capitate. 

 t Fruit with primary ribs onty. 

 Tribe III. Ammines. Fruit compressed laterally, or didymous. 

 Tribe IV. Sesei.ine.e. Fruit with the transverse section orbicular. 



Tribe V. Angelice.!:. Fruit compressed dorsally; the margin dilated into a double wincr. 

 Tribe VI. Peucedane.!:. Fruit compressed dorsally ; the margin dilated into a single winw. 



tf Fruit with both primary and secondary ribs. 

 Tribe VII. Daucines. Secondary ribs mostly winged: fruit terete, or somewhat dorsally compressed ; the wings 

 prickly. 



Series 2. CAMPYLOSPERMjE, DC. AHiumcn vilh a Itmgilmlinal groove internally, or the margins 

 involute. 

 Tribe VIII. Sc*NDiciNEiE. Fruit elongated, laterally compressed, furnished with primary ribs only. 

 Tribe IX. Smybnieje. Fruit turgid, laterally compressed, furnished with primary ribs only. 



Series 3. CCELOSPERMjE, DC. Albumen involute at the apex and base. 

 Tribe X. C0RUNDRE.E. Fruit laterally compressed, didymous or globose. 



• The vittiE are best seen in a tliin transverse slice of the fruit. They are often perceptible, however, ezteroally. 



