MACLOSKIE CALYCERACE^E. 759 



6. BOOPIS CRASSIFOLIA A. Gray. 



Glabrous. Stem, 20-30 cm. high, with branches leafy to the top. 

 Leaves fleshy, sessile, mostly amplexicaul, lanceolate or narrower, repand- 

 toothed. Heads shortly peduncled. Involucre fleshy, deeply 5-y-cleft, 

 its segments oblong. Calyx-lobes of 2 kinds, broad-triangular and nar- 

 rower. Receptacle-pales filiform, with spatulate apex. Achenes mostly 

 5-winged, dimorphous, the larger crowned with 4-5 spines, the smaller 

 with acute lobes. 



Patagon., widely distributed here, in sandy soil by the coast, and on the 

 higher plateau. 



B. CRASSIFOLIA SPINULIGERA Speg. 



Taller, 25-50 cm., coarsely branching. Leaves sessile, elliptic or sub- 

 spatulate (40 mm. by 12 mm.), irregularly repand-toothed ; the teeth mu- 

 cronulate or spiniferous. 



N. Patagon., by Rio Negro and Bahia San Bias. 



7. B. FILIFOLIA Speg. 



Glabrous, stemless, with filiform rhizome, and short, fasciculate-leafy 

 branches. Leaves narrow-linear, entire, obtuse. Heads solitary, acrog- 

 enous, sessile amid the leaves, mid-sized. Involucre hemispherical, 6- 

 i2-toothed. Achene obscurely pentagonal. 



S. Patagon., by Rios Sta. Cruz and Chico ; between San Julian and 

 Rio Deseado. 



8. B. GRACILIS Phil. 



Glabrous, branching annual, about 22 mm. long, high, glaucous. Leaves 

 pectinate, oblong-linear in outline, with 3-5 teeth on both sides, the upper 

 shorter-toothed, the uppermost entire. Involucral scales connate more 

 than half way, broad-triangular, equalling the flowers. Pales very few, 

 hair-like. Corolla short, its tubes subcylindrical. Fruit 5-costate. 



(Chili) ; Chubut, in pastures near Carren-leofu. 



9. B. LACINIATA Ball. 

 Leaves laciniate. Cetera ? 



N. Patagon., on gravelly beds of Rios Negro and Chubut. 



IO. B. LEPTOPHYLLA Speg. 



Glabrous, tall. Radical leaves crowded, long-linear, obtuse, entire or 

 apically lobed. Scape erect, angulate-striate, remotely leafy, bearing an 



