RHYTACHNE. ^ ANDROPOGONEJE (AUCT. EDUARDO HACKEL). 218 
cellatarum in aristam 6—7 em. longam abeunte. — Analyses spicula- 
rum in tab. nostr. 1, fig. 15. 
Innovationes extravaginales. Culmi 40—60 em. alti. Vaginz ima . 
emortu:e diu persistentes dilatate innovationum basin dense eingen- 
tes. Laminæ anguste lineares, setaceo-acuminatze, 10—20 cm. longse, 
2—3 mm. latz, virides, rigidule, excepto margine scabro glaberri- 
mæ, nervis lateralibus utrinque 3—4 supra prominentibus percurs&. 
Racemus circ. 14 em. longus, sordide viridis et violaceo-suffusus ; 
articuli basi ciliati, ceterum parce pubescentes, appendice insqualiter 
dentato minute ciliolato. Spicularum sessilium gluma I^* acutiuscula, 
integra, preter series muricum infra apicem setuloso-eiliata, dorso 
planiusculo seabro-punetata, superne medioeostata costa muriculata, 
3-nervis, glabra ; II“ I" subsuperans, lanceolata, navicularis, bre- 
viter acuminata, carina superne sinuata setuloso-ciliolata, margine 
molliter ciliolata, 1-nervis ; II I^» subzequans, lineari-oblonga, obtusa, 
ciliolata, paleam similem bidentulam floremque c antheris 4 mm. 
longis fovens ; IV* elliptico-oblonga, obtusa, eum palea apice ciliata. 
Spieul® pedicellatz sine arista 8 mm. longa, lanceolatæ; gluma I™ 
callo glabra, flexuris marginalibus setuloso-ciliolata, 3-nervis, arista 
basi complanata, recurvata, squarrosa, scabro-ciliolata ; reliqua omnia 
ut in spiculis sessilibus nisi flos superior etiam g'. 
Port Natal (Gueinzius in h. Vindob.). 
Obs. Munro l. e. p. 442 ad Vossiam citat sine ulla deseriptione 
Rottbolliam hordeaceam suam ineditam. An Urelytrum squarrosum ? 
Alteram speciem hujus generis a Burchellio pr. Litakun lectam 
(n. 2200) dicit. Neutram vidi. 
XVIII. RHYTACHNE Desv. in Hamilt. Prodr. Fl. Ind. oce. p. 11; 
Opuse. p. 75; Benth. et Hook. Gen. Pl. 3, p. 1096 inter genera 
dubia. 
Racemi subeompositi spicam referentes in apice culmi solitarii v. 
racemosi, subeompressi ; rhacheos fragilis articuli recte disjungentes, 
disjuneti apice cavitatem profundam subrotundam exhibentes, non 
appendieulati; pedicelli articulis accumbentes, liberi. Spieule ad 
quemvis rhacheos nodum bins, primaria pedicellata plerumque minuta 
ad glumam I" aristulatam eum pedicello spe sine limine coalitam 
redacta, raro perfecta ; secundaria sessilis biflora, flore superiore 9, 
inferiore c, rarius uniflora, a dorso subcompressa, aristulata : gluma 
I” coriacea v. subchartacea, convexa, aristulis 1—2 terminata, raris- 
Suire au Prodromus VI. 18 
