640 PATAGONIAN EXPEDITIONS : BOTANY. 



3. APIUM COMMERSONII DC. 



Leaves, pinnatisect, the segments multifid, with narrow linear acute 

 laciniae. Petals denticulate, with inflexed tip. Styles rather long and 

 divaricate. 



Patagon., by Rio Sta. Cruz ; Golfo de San Jorge. 



4. A. GRAVEOLENS Linn. Celery. 



Basal and lower leaves long-petioled ; others short-petioled to subses- 

 sile, the segments 3-5, broadly ovate to oval, toothed and incised, 12-16 

 mm. long. Umbels oppositifoliose and terminal, 3-y-rayed. Involucres 

 and involucels small or none. Flowers minute, white, on short pedicels. 

 Fruit oval, its ribs slightly winged. 



(Eur.; escaped in N. Amer., Chili; also in S. Africa, Tristan, and 

 Tasmania); N. Patagon., at Lago Nahuel-huapi ; W. and S. Patagon., by 

 Dusen & Speg.; abundant at Magellan; Fuegia, passim; Staaten I.; 

 Falkands. 



4. A. LEPTOPHYLLUM (DC.) F. Muell. (A. ammi Jacq., Urb.) 



Slender, much branched. Leaves ternately multisect, with capillary 

 segments. Umbels oppositifoliose, 2-3-rayed, without an involucre. Pet- 

 als entire, small. Stamens not protruding. Delicate flowers and small 

 fruit. 



(Old World and Amer., chiefly in warm parts, also grown wild in 

 Austral.); N. Patagon., by Rio Negro. 



(Has been variously referred to Sison, Arethusa and Helosciadium.] 



5. A. PROSTRATUM Labill. (sub Petroselinum in DC. Prodr.). 



Stem procumbent, flexuose. Leaves pinnatisect ; the segments petiolu- 

 late, pinnatifid ; the subsegments 5-7, lanceolate, and apically trifid. 

 Umbels subsessile, oppositifoliose; involucre about i -leaved. 



(Australia and Tasmania); Magellan? Edible. 



6. A. RANUNCULIFOLIUM H. B. & K. 



Leaves subternatisect ; their segments obovate-cuneate, the lateral 

 5-lobed, the intermediate 3-partite ; subsegments 2-3-lobed. 



("Apio-a-moron" ; Columbia and coal regions of New Granada); N. 

 Patagon. 



