UMBELLIFERiE. 307 



(-7), ovate, pointleted, callous on the repand, subentire or obsoletely crenate margin, long- 

 petiolulated : sheath of the long petiole produced into an axillary ligule ; umbels exinvolu- 

 crate, in compound, terminal, peduncled racemes; calyx-limb minutely 5-dentate; styles 

 2 (-" 3 ") ; fruit rather dry, roundish, contracted at the commissure. — A low tree ; petioles 

 4"-8", petiolules 2"-l", leaflets 4"-3", secondary peduncles 6'"- 10'", pedicels 2"'-3'" long. 

 — Hab. Dominica !, Imr., in the mountains, S. Vincent !, Guild. ; Trinidad !, Pd. ; [Guade- 

 loupe ! ; Venezuela IJ. 



7. P. Morototoni, Aubl. Arboreous, unarmed ; leaves digitate: leaflets 7-10, oblong, 

 tapering at the base, undulate, subentire, glabrous above, aurate-sericeous beneath ; umbels 



LXXXIX. UMBELLIFEILE. 



Calyx-limb reduced. Stamens 5, epigynous. Ovary 2-celled : ovules single, pendulous : 

 styles distinct, thickened at the base. Carpids indehiscent, at length distinct and pendulous 

 from the filiform, central carpophore. Seed usually adhering to the pericarp. Embryo 

 minute, in the top of endosperm. — Stem mostly herbaceous ; leaves sheathing at the base 

 of the petiole ; flowers in umbels, rarely in heads. 



This Order, known in the temperate zones for its aromatic, balsamic, bitter, nutritious, 

 or narcotic properties, numbers only few, useless, tropical forms. The essential oil of the 

 pericarp is contained in longitudinal canals (the vitta:) . Of nutritious Umbelliferce, Arra- 

 cacha esculenta is cultivated in Jamaica, and several European pot-herbs have been natu- 

 ralized in the mountains. 



1. HYDROCOTYLE, L. 



Calyx-limb obsolete. Petals ovate, acute. Fruit laterally compressed. Carpids devoid 

 of vittse : ribs filiform. — Aquatic, creeping herbs; leaves peltate or cordate ; umbels simple 

 or proliferous ; flowers white. 



1. H. umbellata, L. Glabrous, radicant; leaves peltate in the middle, orbicular, cre- 

 nate; peduncles nearly as long as the jjetioles; umbels expanded, many-flowered; fruit di- 

 dymous, emarginate at the base : carpids b-ribbed : the intermediate lateral ribs conspicuous. 

 — Rich, in Ann. Sc. P/iys. 4. t. 52./. 3. — Variable in size. — Hab. Jamaica!, all coll., 

 common in rivulets; Trinidad!, Cr., in swamps; [Massachussets to Guiana! and Peru; 

 Galapagos !]. 



2. H. asiatica, L. Radicant ; leaves fascicled, cordate-roundish or cordate-ovate, with 

 a spreading sinus, crenate-dentate, dentate, or repand, glabrescent : petioles hairy, exceeding 

 the short peduncles ; umbel contracted, few-1-flowered ; fruit reniform : carpids ^-ribbed 

 and reticulate : 5 ribs prominent. 



o. Leaves cordate-orbicular, crenate. — Rich. I. c. t. 55./ 11. 



$■ repanda, Pers. Leaves cordate-ovate, dentate, or repand. — Rich. I. c. I. 57. /. 14. — 

 H. brevipes, DC. sec. Macf. 



Hab. Jamaica !, Macf., Al., Wullschl., March (0) ; Trinidad !, Cr. (a) ; [South Caro- 

 lina ! to Valdivia ! ; Abyssinia ! to the Cape ! ; East Indies 1 to New Zealand !, and Pacific 

 islands !]. 



2. SPANANTHE, Jacq. 



Calyx-limb 5-dentate. Petals entire, subacute. Fruit flat-compressed from the back, 

 contracted at the commissure. Carpids devoid of vittse : ribs 5, delicate, immersed, 3 of 

 which are dorsal. — An annual herb ; leaves undivided, superior opposite, glabrous, but peni- 

 cillate-hairy below the serrate limb : sheath short, ciliate ; umbels simple or proliferous, 

 involucrate ; flowers white. 



3. S. paniculata, Jacq.— Jacq. Ic. Bar. t. 350.— Stem 2'-3' high, glabrous, contracted 

 at the nodes; inferior leaves cordate-deltoid, superior ovate-lanceolate, acuminate.— Hab. 

 Trinidad I, Cr., at Maraval : [New Granada, Peru]. 



x 2 



