Otto Stapf. — Graminées nouvelles de la Guinée française. 101 



minusve ad spathas reductis ; rami ramulique fasciculati, ple- 

 rumque 3-ni, gracillimi, flexuosi, irai ad 15 cm. longi, glabri, 

 laeves velsuperiores asperuli ; spathae angustissimae, superiores 

 laminis setiformibus quam parte vaginali brevioribus vel brevis- 

 simis, pallide fuscae vel purpurascentes, plerumque pilis longis 

 tenuissimis patulis hinc inde aspersis; pedunculi toti vel apice 

 excepto in vagina inclusi, ei fere aequilongi vel multo breviores, 

 puberuli. Spkula sessilis "ÏJf anguste lanceolata, 4-5 mm. longa, 

 callo brevi albo sericeo-barbato : Gluma inferior lanceolata, te- 

 nuiter chartacea, apice 2-mucronulata vel 2-aristulata, aristulis 

 brevibus, superne leviter 2-carinata, in carinis asperula caeterum 

 laevis glabraque, nervis submarginalibus utrinque 2 dorsalibus 3 

 tenuissimis basin versus subevanidis; suferior lanceolata, infe- 

 riori aequilonga, superne subcarinata in carina asperula caeterum 

 glabra laevisque, i-sub-3-nervis ex apice aristulata,aristula seti- 

 formi tenuissima quam gluma longiore. Valva t'uferi'oroblonga, 

 latiuscula, obtusa, hyalina, 3 mm. longa, margine superiore 

 délicate ciliato, enervis vel sub-enervis ;s?iperior lanceolata, fere 

 ad médium bifida lobis angustis acutis, vix 2 mm. longa, arista 

 tota circiter 25 cm. longa, gracili, brevissime hirsutiuscula, 

 columna 1 cm. longa. Anlherae purpureae, 3 mm. longae. Styli 

 1 mm. longi; stigmata 1 mm. longa. Spicula pedtcellata <? vel 

 sterilis pedicello gracillimo breviter ciliato 3 mm. longo insi- 

 dens, anguste lanceolata, acuminata 4,5-6 mm. longa, glabra. 

 Glumae subherbaceo-chartaceae, inferior 7-9-nervis, superior 

 5-nervis. Valva inferior ut in flore l|f , saepe purpurascens, 

 superior nulla vel anguste lanceolata, délicate ciliata, hyalina, 

 interdum 1 -nervis. 



Gîii née française : Kouroussa, Pobéguin, 524, 531 ! 



4. Andropogon (% Pobeguinia) arrectus Stapf (sp. 

 nov.), valde affinis A. Afzeliano Rendle, foliis longissime 

 tenuissime attenuatis multo minus pilosis, spiculis minoribus 

 distinctus. 



Culmi teretes, ultrapedales, glabri saepe purpurascentes. 

 Folia inferiora minus, superiora magis pilosa imprimis versus 

 laminae et vaginae junctionem pilis longiusculis tenuissimis; 

 vaginae (infimae non notae) arctae, prominenter nervosae, sen- 

 sim in laminam abientes, ad 10 cm. longae; ligulae brevissimae, 



