34-O PATAGONIAN EXPEDITIONS : BOTANY. 



MYOSCHILOS OBLONGUS ANGUSTUS (Phil.). Leaves narrow-linear. Pata- 

 gonia (?). 



3. IODINA. Hook. & Arn. 



Tall, glabrous shrub, with alternate, rhombic, spinescent-angled, cori- 

 aceous leaves, and sessile, axillary cymes of 5-merous, puberulent flowers. 

 Calyx with its free part broad-campanulate. Style conical, 3-cleft. 

 Ovules pendulous on a central placenta. Globose dmpe, separating into 

 segments. 



Species i, viz. : 



I. RHOMBIFOLIA Hook. & Arn. 



(S. Brazil ; Argentina) ; N. Patagon., in small groves at wide intervals 

 over the dry ground. Fig. in Eng. & Prantl, iii, i, p. 223. Called by 

 the Spaniards "Sambretoro," a name also applied to Maytemis ; by the 

 Araucarians "Trallian." 



4. ARJONA Cav. 



Low herbs, often with tuberiferous rootlets, with alternate, linear or 

 lanceolate, rigid, acute, glabrous leaves, often recurved ; and pubescent 

 flowers in a terminal spike, with bract and free bractlets. Calyx-tube 

 continuing above the ovary; the 5 lobes recurved, spreading. Stamens 

 included ; anthers linear-oblong. Annular disk distinct from calyx. Fruit 

 nut-like, enclosed in bracts and bractlets. 



Species 9, in Chili and Patagon. 



KEY TO THE SPECIES. 



A. Leaves narrow-linear, i -nerved, glabrous. Perianth silky outside. Racemes few-flowered. 



b. Leaves soft, green, apex mucronate. Perianth glabrous inside. ameghinoi. 



b2. Leaves flaccid. Perianth tufted inside. pusilla. 



A2. Leaves lanceolate, 3-nerved, woolly. adpressa. 



AT,. Leaves long-linear, nervose, glabrous. Stem striate, apically naked and villous. longifolia. 

 A^. Leaves linear-lanceolate, 5-nerved, largest upwards, amplexicaul. rigida. 



A$. Leaves ovate, 7-nerved, upwards lanceolate and 5-nerved. 



b. Leaves shorter, with rigid points, deficient downwards. patagonica. 



b2. Leaves longer, smooth or hairy, to woolly. tuberosa. 



I. A. AMEGHINOI Speg. 



Soft, green, glabrous, perennial herb. Leaves alternate, narrow-linear, 

 i -nerved, apex minutely and acutely callose-mucronate. Racemes very 

 depauperate, i-5-flowered, relaxed. Bracts ovate-cochleate, green, gla- 



