22 U R A C H N E. Boumiqoe. 



Piptaihenim Lindleyanum N. ab Es. in Act. Leopold. (18V1) p. 17 

 (149) e Valparaiso a Gurningio lectum quoad descript. et diagnpsin 

 non differt. 



Chile (Guming!) in pascuis sylvaticis saxosis collium pr. Quillota 

 (Bertero!) et in aridis montanis pr. Goncon (Piippigl). Sept. Octobr. 



Gulmi teimes, 1 — 2 pcdalcs. Ligula brevipilosa vel subglabra. \a- 

 riat culmo ramoso et puniilo, caryopsidibus ustilagine corruptis. 

 18. Urac/me obtusa n. Paniculae linearis, contractae, depauperatae radiis bre- 

 vissimis a basi spiculigeris; glumis obtusiusculis, sublinealibus; flos- 

 culo oblongo , glumas subaequante vel paullo breviore , nudo et 

 scabriusculo ; arista tenui, subrecta, non torta, glumis triplo I. qua- 

 druplo longiore. 

 Piptatherum obtusum Nees in Meyen itin. 2 (1835) p. 32 solum no- 

 men. Nees ab Es. Act. Leopold. (18 VI) p. 18 (150) ubi descriplio. 



Peruvia: in planitie alta ad Arequipam 12 — 13000 ped. (Meyenl) 

 Septemb. 



S. V. Piptochaetium Presl 1830. (Caryochloa Sprengel 1827 non Trin. 

 1826.) Flosculi obovati, hinc gibbi, a latcribus quidpiam comprcssi, dor- 

 so bicarinati, striati vel verrucosi. Arista firma, latcralis. — Species in- 

 primis chilcnses ad Brasiliam meridlonalem usque propagatae; per U. 

 setosam in Stipas: intermcdiam et bicolorem naturaliter transeunt,, sed 

 in ipso hoc limitc adbuc U. setosa et stipoides (cujus arista jam evi- 

 denter torta) callo depressissimo subannulari a Stipa bicolori affinibus- 

 que separanda. 



19. Urachne simplex n. Paniculae dcpauperatae sesquipollicaris radiis 2 — 3-nis, 

 a basi fere spiculigeris; glumis late ovatis, acuminato-cuspidatis, 

 subsesquilinealibus:, flosculo obovato, hinc gibbo, lineali, ad callum 



