i ' t
TAB. 12 1. STIPA TRJCHOTOMA.
Culmis CcEspitosis; folüs coQVoIuto-setaceis, rigidis, scabris; panícula ramosa,
crecía, secunda; ramis ramulisque gcminis vel lernis, scabris; spiculis sparsis,
longe pedicellatis; glumis subaequalibus, superne angustatis, trinerviis, purpurascenti
fuscis, ad ñervos bispidulis, florem duplo supcranlibus; palca inferiore luberculalo
spinulosa, scabrala; arista hispido-scabra, inferne leviter torta, glumas
séxtuplo superante.
Stipa tricliotonia ah Esenbech Jlor. Brasil, u. ¡uSyS. Trirt. iiiAct.Petrop.
i83o. i.p. y3.
Crescit ad Mont e Video, u
Radix i-epens, fibras albas emitteus. Culmi crebri, densissime fasciculalo-csespitosi, simplices,
ei^ecti, filiformes, teretes, strialuli, glabri, inferne tri-vei quadrinodes, adjecta panicula subses-
<£uipeclales; nodis obsoletis, glabris. Folia angustis.siine linearia, convoluto-seUcea, strictiuscula,
rigida, scabra, septem-vel octopoliicaria. Vaginx tereliuscula3, membranacea:, striai®,
glabr®, usque ad basim fissK, iaternodia parum superantes. Ligula obliqua, eloBgata, obtusa,
integra, subchartacea, glabra. Panicida erecta, subsecuada, ramosa, sex-vel octopoUicaris; ramis
ramulls^ue filiformibus, elongatis, geminis vel ternis, angulatis, scabris; rhachi strida, tenui,
bine convexa, inde planiuscula, angiilis hispidulo-scabra. Bracteote ad basim infuni vel duoruni
infimorum parium ramorum duse, interdutn unica, parv®, lanceolataì, membranacee, liispiduke.
Spicule solitali^, spars®, longe pedicellate ; pedicel Us Cliformibus, angulatis, scabris,
sub flore calloso-incrassatis. Gluma: du®, subaiquales, oblongo-lanceolat®, superne angustat®,
carinat®. Innervi®, nervis laleralibus superne evanescentibus, purpurascenti-fiasc®, apicem
versus hyalino-albid®, patul®, duas lineas long®; inferior nervis margineque hispida; superior
interdum brevior, uonnisi ad ñervos liispidula. Flos sessilis, basi barbalus ibique arliculatus,
oblique obovatus, lateribus compressiusculus, glumis dimidio brevior, fiiscescens ; pilis albidoargenteis
flore dimidio brevioribus, adpressis. Pale® du®, valde in®quales; iaierior latissima,
conduplicato-convoluta, marginibus sibi mutuo arete incumbentibus, cbartacea, quinquenervia
, tuberculis minutissimis spinul®formibus scabrata, stramineo-fuscescens, apice aristata ;
arista iiliformi-setacea, inferne spiraliter torta, hispido-scabra, poUicaris vel brevior, basi articulata.
Palea superior dimidio brevior, inclusa, oblonga, apice obsolete dentata, subconcava,
glabra, byalina. Genitalia baud vidi. Caryopsis paleis arete obtecta, oblique obovato-turbinata,
lateribus compressiuscula, apice oblique truncata, basi stylorum apicata, bete fuscescens, striatuia,
glabra, opaca, lÜDera. Pericarpium tenuiter membranaceum, semini adnatum. Albumen
album, farinaceum. Embryo minutus, basi albuminis oblique applicatus, paleam inferiorem
specuns, albus. Corculum oblique abbreviato-conicum, cotyledoni elliptico insidens, superne
solutum et diphyllum; foliolis cotyledoni contrariis, genimulam minutissimam amplectentibus.
Mi
I f
" •• ' I l
i ' i l
lì"
p.
iì•