342 PATAGONIAN EXPEDITIONS I BOTANY. 



6. ARJONA RIGIDA Miers. (A. tuberosa Phil, non Cav.) 

 Low undershrub, 7 cm. high, with slender, striate, glabrous stems 

 Leaves smaller and sparse below, larger and denser above, linear-lanceo- 

 late, canaliculate, amplexicaul, cuspidate-pungent, 5-nerved, margin carti- 

 laginous, divaricate, glabrous. Inflorescence terminal, with a short silky 

 peduncle, sessile flowers, and ovate-lanceolate, villous calycle. Bracts 2, 

 laterally opposite, concealed by the calyculus, oblong, snowy-tomentose. 

 Perigonmm orange, retrorsely villous on outside. Tube slender; seg- 

 ments oblong, acute, glabrous inside. Filaments short ; anthers included. 

 Ovary 5-angular. Style filiform, 3-branched. 



(Argentina to Mendoza); probably in N. Patagon. 



7. A. TUBEROSA Cav. 



Herb from a woody base, 12 cm. high; branches glabrescent. Leaves 

 smooth or hairy, the lowest ovate-acute, 7-nerved ; the others lanceolate, 

 5-nerved. Bracts and bractlets ovate-acute, hairy outside. Perianth- 

 tube cylindrical, funnelform upwards, pilose or silky. 



S. Patagon., Valley of Rio Gallegos (Nordenskj.); Magellan; Rio Sta. 

 Cruz (Hatcher); Puerto Deseado; N. and E. Chili; Golfo de San Jorge 

 (Mts. of Chili). 



A. TUBEROSA LANATA n. var. (Plate XVI.) 



"Apparently a woolly variety of A. tuberosa Cav., from which it differs 

 very slightly in the flower." (Royal Gardens, Kew.) 

 By J. B. Hatcher in S. Patagon. 



* 



5. QUINCHAMALIUM Juss. 



Low, glabrous herbs, with alternate, very narrow leaves and terminal 

 spikes or heads of flowers, with a depressed, cup-like calycle, having a 

 lacerate margin. Calyx globose, 4~5-costae, ending in as many teeth, one 

 of these slightly enlarged. Corolla tubular, its throat enlarged and bearing 

 the slightly exserted, ovate-cordate anthers, which are opposite the acutely 

 oblong, subrecurved corolla-lobes. Style filiform with 3 small stigmas. 

 Ovary ovoid-globose, i -celled, with 3 ovules. Nut i -seeded within the 

 persistent calyx. 



Species 20, in the Andes ; the expressed juice is used medicinally as a 

 drink. 



