1877.] Knowledge of the Burmese Flora. 113 



and conspicuous, or rarely by 2—3 and obsolete, reaching- the base of the fruit or some- 

 times shorter. 



Hekacleum. Petals often radiate. Mericarps flat-compressed or hardly convex 

 at the middle, the margins wing-like ; vittro solitary or rarely by twos in the furrows, 

 often clavate, reaching the base of the fruit or more usually shorter. 



X X Secondary ribs of the mericarps filiform, somewhat prominent 



or winged, rarely all the ribs more or less inconspicuous ; vitta? in 



the furrows or below the secondary ribs conspicuous or obsolete. 



Trib. 6. CA TJGALINEM. Fruit almost terete or slightly compressed from the 



sides, or more so from the back, not winged, or rarely the primary ribs expanded into 



deeply lobed wings or divided into spines. 



* Mericarps glabrous^ the ribs blunt, smooth or wrinkled. 



CoRiANDRUM. Fruits almost globose, the broad very blunt secondary ribs hardly 

 prominent. Involucre none. 



* * Mericarps hirsute, bristly or aculeate. 



Daucus. Seed with rather flat face. Involucre-bracts usually dissected. 

 Caucalis. Seed deeply sulcate or involute on the face. Involucre-bracts linear 

 or none. 



Hydrocotyle, L. 



Conspectus of Species. 



* Leaves entire or crenate. Umbels bracted. 



Flowers by 3 — 4 in the head, sessile ; fruits nearly 2 lin. in diameter, each mericarp 

 with 2 hardly prominent ribs, H. Asiatica. 



* * Leaves more or less lobed, the lobes acute or blunt, crenate or serrate. Umbels 



without bracts. 

 X Peduncles and petioles more or less puberulous. 

 Flowers numerous, almost sessile or very shortly pedicelled, forming rather crowded 

 terminal head-like imibels, the lower ones solitary and axillary, .... H. Javanica. 

 X X All parts quite glabrous. 

 Flowers on slender pedicels, forming slender solitary umbels in the axils of the leaves, 



. . H. Birmanica. 



1. H. Asiatica, L. sp. pi. 234 ; DC. Prod. IV. 62 ; Eoxb. Fl. Ind. 

 II. 682 ; Wight Icon. t. 565. (H. cordifolia, Hf. in Hook. Icon. pi. t. 

 303). 



Hab. Eather frequent in grass-land, especially along river-sides, in 

 cultivated lands chiefly, all over Pegu and Martaban, up to 2500 ft. eleva- 

 tion, and no doubt all over the country ; Andamans introduced, and now- 

 much spread. — Fr. Febr. 



2. H. Javai^ica, Thunb. Diss. II. 415. t. 3 ; Miq. Fl. Ind. Bat. I. 

 734. (H. Nepalensis, Hook. Exot. Bot. I. t. 30 ; K. polycephala, WA. 

 Prod. I. 366 ; Wight Icon. t. 1003). 



Hab. In the betelnut-plantations of the Martaban hills east of Toun- 

 ghoo, up to 3000 — 4000 ft. elevation. 



3. H. BiEMANiCA, Kurz in Journ. As. Soc. Beng. 1871. 60. 



Hab. Upper Tenasserim, Daunat toung, 3000 ft. (Dr. Brandis) ; 

 Thounggyeen, at 5000ft. elevation (Revd. Parish). 

 15 



