398 M. Kuhn, E. Hackel, 0. Böckeler, F. Buchenau. 
Panieum (Sect. Digitaria) commutatum Nees, Fl. Afr. austr. p. 25. 
Griqualand- West, in depressis arenosis prope urbem Kimberley 
(alt. 4070 m, Jan , Marl. n. 882); Betschuanaland, in planitie lapidosa 
prope fontem »Groot-Kuil«, alt. 1470 m (Marl. n. 997). — Florif. Febr. 1886. 
P. (Sect. Brachiaria) Marlothii Hack. n. sp. 
Perenne, humifusum. Culmi longe repentes radicantesque, multinodes, 
ramosi, ramis geniculato-ascendentibus, parte erecta 5—8 cm longa, com- 
pressis, glabris, striatis. Vaginae laxae, subcompressae, internodiis bre- 
viores, saepe pilis raris basi tuberculatis adspersae, altero margine ciliatae, 
ore barbatae, nodis pubescentes. Ligula obsoleta, ciliolata. Laminae e basi 
latiore angulis subrotundata lanceolato-lineares, acutae, 1,5—3 em longae, 
2—4 mm latae, patulae, firmae, virides, subtus praeter nervum medium 
setis basi tuberculatis laxe consitum glabrae, supra appresse puberulae, 
margine cartilagineo-incrassato setis longis basi tuberculatis laxe fimbriatae, 
costa media 1-nervi crassiuscula, nervis lateralibus tenuissimis. Racemi 
2—4, in culmi ramorumque apice arete congesti, inflorescentiam formantes 
11/,—2 cm longam ovali-oblongam subglomeriformem, rhachi communi 
compressae, angulosae, scaberulae insidentes, subsessiles (pedicellulo bre- 
vissimo setis barbato fulti), 7—12 mm longi, crassi, densiflori, rhachi tenui- 
filiformi compressa angulis acutis scaberrima. Spiculae imbrieatae ad rhacheos 
nodos binae, altera subsessilis, altera pedicello ipsa 3plo breviori setifero 
fulta, ovales, 2 mm longae, virides: gluma Ima spicula duplo brevior, late 
ovata, acutiuscula, hyalino-membranacea, uninervis, glabra; lda spiculam 
aequans, ovalis, obtusa, convexa, membranacea, nervis 5 viridibus elevatis 
scabris notata, in !/, superiore cingulo transverso pilorum brevium velut 
coronata, ceterum parce puberula v. glabrescens; lla Idae simillima nisi 
marginibus implicata, flexuris superne penicillato-hispidulis, ceterum 
puberula v. parce hispidula, paleam includens ei subaequilongam obtusius- 
culam hyalinam binervem, floremque 3 antheris 0,8 mm longis; gluma IVa 
spiculam subaequans, ovalis, obtusissima, convexa, albido-viridula, minu- 
tissime puncticulato-scaberula, obsolete 5nervis, includens paleam similem 
binervem, floremque 8 antheris À mm longis, stigmatibus brunneis ex 
apice spiculae exsertis. 
Betschuanaland, in planitie lapidosa prope pagum Manjeering 
(Marl. n. 4147). — Febr. 1886. 
Species peculiaris, nulli mihi notae arctius affinis. 
P. (Sect. Brachiaria) glomeratum Hack. in Verh. bot. Ver. Prov. 
Brandenb. 30, p. 444. 
Hereroland, ad ripas arenosas fluminis Suachamb prope Hykamchab, 
alt. 200 m (Marl. n. 1486). — Flor. Apr. 
P. (Sect. Brachiaria) melanotylum Hack. n. sp. 
Perenne, dense caespitosum, innovationibus omnibus intravaginalibus. 
Culmi erecti, ca. 60 em alti, superne compressi, striatuli, puberuii, anguste 
