100 MUSEO NACIONAL DE BUENOS AIRES. 
epitosi fasciculati erecti, paucis fertilibus immixtis; folia 
alterna membranacea subflaccida, culmis conspicue brevio- 
ra, alterna viridia, vaginis pallidis longiusculis (5-6 cm long.) 
plus minusve relaxatis laxe patuleque piloso-pubescenti- 
bus, limbis erectiusculis in vivo subplanis, in sicco con- 
volutis longiusculis anguste linearibus (5-12 cm long., 
125 mm lat.), folioram radicalium patule piloso-hirsutis, 
culmigenorum subglabratis, dense striatulis, antice sensim 
attenuatis apice obtuse calloso-acutatis, ligulis brevissimis 
marginiformibus integris v. denticulatis glabris; culmi fer- 
tiles erecti graciles (30-50 cm alt.), steriles et folia duplo 
et ultra superantes ad medium usque vaginati, sursum nudi 
flavescentes glabri laeves v. minute striati; spica erecta 
eracillima 5-15-spiculigera, sublaxa non v. rarius leniter 
subsecunda, rachide subflexuosa glabra, internodiis spicu- 
lis brevioribus (5-7 mm long.) contra spiculas plano-con- 
caviusculis margine scabriusculis dorso rotundatis atque 
subarquatulis; spiculae sessiles erectae adpressae solitariae 
lanceolatae (8-10 mm long. aristis exclusis, 2,5-3 min lat.) 
3 v. sub4-florae; glumae obovatae inaequilaterales, deorsum 
cuneatae, sursum e latere interno anguste lineares, ex 
externo ampliatae oblique rotundatae integrae v. denticu- 
latae, infera minore angustioreque (6 mm long., 1,5 mm 
lat.) Inervia, supera longiore atque latiore (7 mm long,, 
2,2 mm lat.) 1-v. obscure 2-nervia, ambae glabrae laeves 
sublucidae obtusae, nec aristulatae nec mucronatae; flores 
olumas superantes densiusculi aproximati, inferi fertiles 
(7-9 mm long. sine aristis) supremus saepius abortivus, in- 
fimus sessilis, caeteri pedicellati, racheolis tereti-obconicis 
(1 mm long.) dense scabridis oblique truncatis; valvula 
infera non carinata lanceolata (7-9 mm long., 2,5-3 mm lat.) 
5-T-nervia, deorsum glabra (v. vix ad margines pubescens) 
sursum ultra medium laxe grosseque papilloso-scabrida in 
arista longiuscula (3-5 mm long.) rigida recta secaberrima 
producta (saepe ad basin aristae utrinque fissa pseudo- 
dentata); valvula supera conspicue brevior (6-7 mm long, 
1 mm lat.) subhyalina lineari-lanceolata apice obtusa sae: 
peque subretusa, glabra margine minute pectinato-cilio- 
lata. 
291. Hordeum chilense Brogn.—Gay, Fl. Chil. vi, f. 458. 
Hab. Non rarum in pratis sabulosis siccis: Elizabeth 1sl.; 
Punta Arenas. 
