394 PATAGONIAN EXPEDITIONS I BOTANY. 



brous. Flowers solitary on long axillary, filiform peduncles, puberulous, 

 in fruit curved upwards. Calyx-lobes ovate, acuminate, carinate. Petals 

 oblong-obtuse, white, shorter than the calyx; rarely none. Ovary sub- 

 globose, 6-valved ; few-seeded. 



Variable. One form is low, with simple, i -flowered stems and short, 

 pungent leaves. Inflorescence sometimes diffuse. 



(N. &S. Amer.) S. Patagon. (Hatcher.) 



2. ARENARIA DICRANOIDES H. B. & K. (A. radians Benth.) 

 Cespitose, glabrous. Leaves imbricate in 4 ranks, ovate-lanceolate, 



acute, concave, i -nerved, ciliate, 4-5 cm. long, connate at the base. 



Flowers terminal, solitary, sessile, digynous. Calyx-leaves oblong, acute. 



Petals spatulate, exceeding the calyx. Filaments connate at base. Styles 



2. Seeds 4. 



(Mt. Antisana; Bolivia, per Gray Herbm.); S. Patagon. (Hatcher. 



The leaves have black spots, consisting of ascospores of fungus.) 

 (A. GRANDIS = Buda grandis. ) 



3. A. LANUGINOSA Rohrb. 



Lax, procumbent, puberulous. Leaves linear, or ovate-lanceolate, 

 acuminate, attenuate at the base. Flowers solitary, axillary. Calyx- 

 segments carinate, acuminate. Seeds lenticular, smooth, shining. 



(Mex. to Argent.) (Probably the same as A. alsinoides W.) 



A. LANUGINOSA DiFFUSA (A. diffusa Ell.). 

 (Bolivia) ; Patagon. 



4. A. PATAGONICA Phil. (A. palustris patagoKica Reiche.) 

 Stems rough with remains of dead leaves Leaves lance-linear, broad 



in the middle. Flowers on the apex of the branches, not crowded. 



Petals lanceolate, slightly exceeding the calyx. 

 Patagonia. 

 (Philippi's description seems to belong to a different plant. That 



given above is chiefly from Reiche.) 



5. A. SERPENS H. B. & K. 



Glabrous, much branching, with long creepers. Leaves oblong, sub- 

 spatulate, obtuse, somewhat fleshy, veinless, basiciliate. Petals scarcely 

 exceeding the sepals. Seeds about 15, smooth and shining. 



