333 
Ich lasse nun die Diagnosen der neuen Arten folgen: 
24. Panicum santhotrichum Hack. 
Annuum. Culmi striete ereeti, graeillimi, 5—9 dm alti, teretes, 
estriati, glaberrimi, 3—4-nodes, simplices. Foliorum vaginae teretes, 
arctae, internodiis breviores, ‚pilis tuberculatis adspersae v. supe- 
riores glabrae, nodis glabris; ligula brevissima, truncato-rotundata. 
membranacea, fuscescens, ciliolata; laminae e basi aequilata vix a 
vagina distincta lineares, sensim a medio acutatae longe acuminatae, 
inferiores 4—9cm lg, 3—5mm It., erectae, firmulae, glabrae, 
praeter marginem incrassatum scabrum laeves, tenuinerves. Racemi 
bini, alter sessilis, alter breviter pedunculatus, patuli, graeiles, 
8—14 cm Ig., laxi, sublaxiflori, rhachi rectiuseula, spieulis angustiore, 
trigonula, anguste viridi-marginata, angulis scabra, glabra. Spieulae 
ternae, pedicellis linearibus compressis, planis, inferne aculeolato- 
scabris, apice flavo-barbatis non patellatis, primario spieulam supe- 
rante, secundario ea paullo, tertiario (interdum aboriente) pluries 
breviore fultae, late lanceolatae, 2:5 mm Ig., flavescentes, raro sub- 
violascentes, hine gibboso-convexae: gluma I O; II. spieula paullo — 
'/, brevior, ea multo angustior, lineari-lanceolata, acuta, flavo-pilosa 
et longe eiliata, hyalino-membranacea, 3-nervis; III spiculam aequans, 
late lanceolata, acuta, membranacea, Ö5-nervis, setis rufidulis longe 
eiliata et insuper in '/, inferiore eingulo setarum longarum trans- 
verso ornata, quae setae in spiculis primariis verrueis penicillatim 
insidentes cum setis marginalibus valde patent, in secundariis vero 
verrucis carentes porriguntur. Pili glumae II et III saepe versus 
apicem fuscescunt. Gluma IV spieulam aequans, ovato-lanceolata, 
acuminata, parum convexa, seriatim puncticulata, scaberula, demum 
livide v. pallide viridula. 
Afriea centralis. Djur, leg. Schweinfurth, nr. 2380. 
Eine durch die eigenthümliche Behaarung der Aehrchen sehr 
auffallende Art, deren Verwandtschaft mit dem im Conspectus 
vorangestellten P. argyrotrichum Anderss. nur eine sehr lose ist. 
25. Panicum Gerdesii Hack. 
Annuum? Culmi ascendentes, 5—8dm alti, graciles, plurinodes, 
e nodis inferioribus ramos floriferos edentes, teretes, glaberrimi. 
Folia undique pilosa, pilis basi plerumque tubereulatis; vaginae 
laxae, internodiis breviores; ligula brevis, truncata, glabra ; laminae 
e bası subangustata lineares, sensim acutatae, erectae, rigidae, ad 
20 cm Ig., 5 mm It., scabrae, erassinerves. Racemus saepissime so- 
litarius, raro racemi bini subconjugati, ereeti, 10—15 em Ig., eras- 
siusceuli, densiflori, rhachi spieulis subangustiore latissime albo- 
striata, stria anguste viridi-marginata, undulata, angulis scabra, pe- 
dicellos 4—-5-nos valde inaequales (longiores spieulam superantes) 
crassiusculos hispidulos apice patellatos procreante. Spiculae late 
ellipticae, obtusiusculae, 2:5 mm Ig., cano-viridulae: gluma I 0; II 
spicula paullo brevior, ovali-elliptica, obtusiuseula, membranacea, 
