~ 
20 ARKIV FOR BOTANIK. BAND 10. w:o 1%. 
Ichnanthus mollis n. sp. 
Tafel 2, Fig. 2; Tafel 6, Fig. 10. 
Annuus. Culmi adscendentes, ad nodos infimos radican- 
tes, 1—2 dm longi, teneri, 5—7-nodes, copiose florifero-ramosi, 
angulati, striati, laxe tenuiter pilosi, violascentes. Foliorum 
vagine laxe, ramo axillari a culmo solute, striate, straminee, 
laxe, longissime molliterque pilose, 1— 1,5 cm longs, internodiis 
denique duplo—quadruplo breviores; ligula nulla, eius loco 
cilia brevissima; lamine haud petiolate, e basi angustiore 
lanceolate, ad 7 cm longe, 1,5 cm late, longe acuminate, 
patentes, tenues, flavo-virides, superne glaberrime, margine 
scabr&, subtus molliter pubescentes, tenuinerves, nervis late- 
ralibus utroque latere ad 20. Panicule terminales axillaresque 
ut in specie precedenti, ramis axillaribus tamen brevioribus, 
ad panieulam unam subfastigiatam redactis, lucidissime, dif- 
fuss, graciles, pro rata graminis magne, terminales ad 10 cm 
longe, 8 cm late, rhachi communi sulcato-angulata, levi, 
longissime patenti-pilosa, ramis singulis binisve, sed ad ipsis- 
simam basin divisis, hoc modo spurie verticillatis, elongatis, 
capillaribus, erecto-patulis, strictis, radiantibus, iterum divisis, 
scaberulis, ut rhachi pilosis, pilis e tuberculis enatis, 5 mm 
longis vel ultra. Spicule bine, longe pedicellatze, pedicellis 
spiculis duplo—multoties longioribus, apice cupulatis, elliptico- 
lanceolate, 2,5 mm fere longs, 0,8 mm lata, apiculate, primo 
sordide violaceo-virides, dein straminez, pilose. Gluma I. 
quattuor spicule partes squans, amplectens, ovata, 2 mm 
longa, apieulato-acuminata, 3-nervis, dorso longe patenti- 
pilosa; gluma II. elliptico-ovata, breviter acuminata, 5-nervis, 
extus tota pilosa; gluma III. secunda conspicue brevior, ob- 
tuse acuminata, glaberrima, 3-nervis, in axilla paleam fovens 
eam equantem; gluma IV. fertilis primam fere equans, 
elliptico-obovata, obtuse acuminata, 1,3 mm longa, 0, mm 
lata, nitida, glaberrima, primo straminea, dein atro-fusca, 
tenuissime 5-nervis, nervis glumz adulta pulchre prominenti- 
bus, basi auriculis instructa anguste ovatis, obtusis, quartam 
glume partem equantibus, liberis. Palea haud explanata 
late lanceolata, acutiuscula. 
Prov. Matto Grosso, ad »Cascata grande» catarrhactam 
prope Buriti legit G. O. MALME, 8. 6. 03, sub numero 3480 
Exp. II. Regn. 
