A LA FLORE DU PARAGUAY. 139 
subæquilonga ac pallidior. Caryopsis lenticularis late subovata, turgida, marginata, 
alba, nitens, squamæ ‘}, brevior, basi leviter angustata, rostro lato aut discoideo 
dilatato coronata. Stylus deciduus ad medium bifidus, stigmatibus pertenuibus ferru- 
gineis, parum exsertis. Filamenta caryopsin subæquantia, antheris brevibus, apice 
appendiculatis. Setæ caryopsi multo breviores, scabridæ aut nullæ. 
Tabula XL, B : 7, facies; 8, spicula; 9, pistillum ac stamina; 10 squama. 
E. debili proxima, differt caryopsi minore, alba, nec rugulosa, rostro magis dilatato. 
Villa- Rica, in paludosis,, Octobr., n. 686. | 
E. capiraTA R. Br., Prodr. FI. Nov. Holl., p. 8; Kunth, & c., p. 150; Bôckeler, 
l e., XXXVI, p. 461. — Scirpus capitatus Willd., Spec., T, p. 294: A. Grisebach, 
L e., p. 311; — Sc. caribœus Roub., Gram., p. 46, 1. 15,1. 3 ; —Eleogenus atropur- 
pureus Nees ab Esenb., L. c., p. 104. 
In pratis humidis planitiei circa Dofa-Juana, prope Villa-Rica, Apr., n. 430; ad 
pedem montis Cerro Lambare, Apr., n. 439. 
Area geog. in tropicis frequens. 
E. coNTRACTA n. sp. Rhizomate descendente fibroso: culmis pluribus erectis, sub- 
teretibus, snlcatis ; vaginis ore transverse truncatis, postice breviter lanceolato-pro- 
ductis; spicis cylindricis, lanceolatis, elongatis ; squamis densis, adpressis, marginatis ; 
caryopsi ovoidea, basi constricta, lutea, nitida, subtrigona ; rostro-abbreviato, fusco; 
stylo trifido, exserto. 
Rhizoma oblique descendens, radicibus tenacibus, filiformibus, fuscis vel atrofuscis. 
Culmi fasciculati, erecti, rigidi, 30-40 cm. alti, subteretes vel subcompressi, sulcati. 
Vaginæ duæ : infima brevis, ampliata, membranacea ; superior 5-6 cm. longa, basi 
purpurea, apice pallida aut sordide viridula, ore angustata recte truncata, postice bre- 
viter mucronata, margine purpurea. Spiculæ terminales, elongatæ, 8-12 mm., cylin- 
dricæ, lanceolatæ, acutæ. Squamæ dense adpressæ, ovato-lanceolatæ, margine hya- 
lina cinetæ, disco fuscescentes, carina pallidiore apicem non attingente; squama 
infima major. Caryopsis brevis, subovoidea, obsolete trigona, marginibus seu angulis 
distinctis obtusis, striolata, lutea, nitida, basi constricta, rostro abbreviato parum 
dilatato coronata; cum squama sua decidua. Stylus ad medium trifidus, stigmatibus 
fuscis, papillosis, exsertis. Filamenta tria caryopsin æquantia, antheris longis apice 
breviter productis. Setæ retrorsum scabridæ., tenues, fructum vix æquantes. 
Tabula XLI, C : 15, facies; 16, spicula; 17, squama; 18, pistillum ac stamina; 
19, caryopsis; 20, os vaginæ. 
TOME XXXI. 19 
