AUG. CIIEVALIEIt, — PiOVlTAÏES FLOlî.E AKIÎICAN.E. 22/ 



Gramen annuum, circiter 3 dm. altum. Culmi fasciculati, graciles, 

 teretes, erecti vel suberecti, 4-5-nodi, internodiis magis minusve exsertis, 

 lœves, glabri. Folionan yaginoi teretes vel infimœsubcoinpressai, sunima 

 spathaceo-inflata, !a3ves, glabrœ praîter os barbuLuin; ligulai membra- 

 naceûo, brevissimœ, ciliolaLaî; laminœ lanceolato-liiieares, longe in aplcem. 

 acutum attenuatœ, 7-9,5 cm. longœ, 4-5 mm. latœ, planœ, supra basin 

 versus laxe pilosœ, pilis tenuissimis e tuberculis ortis ad 4 mm. longîs, 



magis minusve inclusi ; rhachisgraciliSjScabrida, internodiiscirciter 1 mm. 



longis; pedicelli brevissimi. Spiculœ fere 4 mm. lougaî, aristatoB. anthœcio 



ferlili unico, cœteris 3 sterilibus rudimentarîis in clavam turbinataiu com- 



pactam rhachillœ internodlo tenaci crassiusculo insedentem aggrefjatis. 



Glumx admodum inœquales, a latere visœ oblique iïneari-lanceolataî, 



acutie, hyalinœ, albidœ. 1-nerves, in nervo parce scaberulœ, inferior ad 



3 mm. longa, superior ad 7 mm. longa. Anthœcium infimum cleistogamum. 



Valm a latere visa oblique semi-eliiptica, acuta, fere 4 mm. longa, 2 mm. 



lata^dcmuiu coriacea et castanea, lœvissima et nitidula, secundum nervos 



barbato-ciliala, pilis niveis marginalibus ad 2 mm. longis patulis, ilorsa- 



■ libus brevibus faciebus adpressis, sub imo apice aristata, arisla setit'ormi 



4-5 mm, longa recta. Palca valvam aîquans, breviter bifida, ad carinas 



dense ciliolata. Antherse 0,3-0,5 mm. longae. Stigmata perlaxe plumosa, 



gracillima, cum staminibus perpetuo inclusa. Antkmcia sterilia, ad valvas 



reducta; infimum 1 mm. longum, a latere visum late obovato-cuneatum, 



Iruncatum, arista ad 3 mm. longa munitum, cœtera minora, exanstal;), 



brevissime exserta. Caryopsis oblongo-ovoidea, subtriquetra, in dorso 



concava, 2 mm, longa. Embryo fere 1 mm. longus, scutello auguste 

 oblongo. 



Bas-Ciiari. — Baguirmi, emplacement de la ville de Masseiiia, 

 ^25-31 août 1903, n° 9633 bis. [Aug. Chevalier]. 



Chîoris robusta, Stapf. 



Afhnis C. Gaijanœ Kunth, sed racemis numerosioribus longioribus in 

 lUuchi communi longiore dispositis, spiculis maioribus, valvis anguste 

 Imeari-Ianceolatis longe ciliato-borbatis distincta. 



Gram(.'« perenne, ad 1,5 m. altum. Culmi robusLi, 7-vel plurinodi, tere- 

 vl- ^ ' lœves, internodiis inferîoribus et summo breviter exsertis. 

 mwram vagina' teretes, ore truncata}, firmœ, pallide virides, Ltvcs; li- 

 Sulae membranaceœ, brevissimae, minute ciliolatse; laminœ lineares, 

 onge m apicem acutum attenuatœ, basi paulo contractœ, 15-25 cm. 

 ongœ, 7-10 mm. latœ^ planœ, glabrae, pallide virides, utrinque asperœ, 

 nervis numerosis arctis prominulis. ^acemi spiciformes, 20-30-ni, 

 secundum rhachin communem dupfo vel ultra breviorem dispositi, 



D^H^^^n^^' '"^^ ^^' ^^"?'ï viridi-albi; rachis specialis gracilis, scabra; 



pedicelh 0,5-1, 5mm. longi. S/3tcw/;f 4-5,5 mm. iongœ, laxe pauciflorœ, 



aamodum hiantes, inconspicue aristatœ; rhachillœ articuU gracillimi, 



œves, ad 1 mm. longi. Glumx valde inœquales, a latere visœ anguste 



neari-lanceolatffi, acutœ, arcte plicatœ, carinatœ, albo-virescentes, 



