406 PATAGONIAN EXPEDITIONS I BOTANY. 



orbicular, trisect, their segments obovate-cuneate, trifid, the terminal sub- 

 segment trisect, between a bisect pair; cauline leaf solitary in the fork, 

 3-partite. Sepals deciduous, reflex, yellowish. Petals 5, golden, obovate, 

 unguiculate. Achenes in a globular head, glabrous, with short hooked 

 styles. 



Fuegia, above Ushuaia at 300-400 m. elevation. (Alboff.) 



2. RANUNCULUS APIIFOLIUS Pers. 



Stems erect, glabrous, fistulous, green, branching. Leaves radical and 

 cauline, petiolate, glabrous, shining; lower leaves 5-lobed, the lobes 

 sinuate-serrate; the petioles basally auricled-sheathing ; upper leaves 

 sublinear. Peduncles axillary, involucrate by 2 opposite, sessile, linear- 

 lanceolate bracts, 3 in each involucre, the mid one larger and i -flowered; 

 the side ones 2-bracted. Flowers white to flesh-colored. Stamens 

 numerous, filaments white, anthers yellow. Achenes obovate, smooth, 

 easily deciduous. 



Patagon., "in swamps through the whole republic." 



3. R. AQUATILIS Linn. Common Water-Crowfoot. 



Leaves of two kinds, some floating and flat, 3-lobed or 3-parted (some- 

 times wanting), others immersed and multifid with capillary divisions. 

 Petals white, nectary without a scale. Ackenes transversely rugose. 



(Temperate Eurasia, Australia); Patagon., Chubut, in subandine pools. 



R. AQUATILIS C^ESPITOSUS DC. 



Leaves petiolate, all emersed, their outline suborbiculate, cut into 

 divergent segments. Pedicel scarcely exceeding the petioles. Ac hems 

 obovate, rugose. 



S. Patagon., in wet places near Rio Sta. Cruz, and at Orr-aike, near 

 Lago Viedma. 



R. AQUATILIS CAPILLACEUS DC. 



Leaves petiolate, all immersed, divided into filiform segments. . 

 Chubut, in slowly flowing waters near Carren-leofu. 



4. R. BITERNATUS Smith. 



Small herb, with many slender stems from a fibrous root, creeping and 

 glabrous. Leaves biternately dissected, the lobes oblong, acute, entire or 



