76 te MONOCOTYLEDONEJE. DIMERIA. 
CONSPECTUS SUBTRIBUUM 
1. Dimeriee. Spicnle in racemos fiip unilaterales dispositæ, ad quemvis rhacheos 
ge nodum solitaris, omnes homogam:, a latere valde compresse, gluma prima 
carina 
2. Ax aln Spieule in racemos subeompositos (rarissime simplices) disposite, omnes 
homogamæ ! (rarissime primarie Q) uniflore v. raro 2-flore, gluma Ima non carinata. 
spits articuli eng graeiliores, distantes, ad cavum formandum conniventes. 
scheme subcom ai raro ae disposite, homogamze 
v. sæpius labs och. primarie (pedicellats®) intesdum ad solos pedicellos MR secun- 
dariæ sessiles semper billore demum cum rhacheos vs secedentes. a Ima ecari- 
nata, IVa in spieulis fertilibus sæpius aristata. Rhacheos euli latere isi non v. 
leviter excisi a pedicellis — nec cum eis cavum ier glumam Ifdam omnino 
oceultantem formantes. 4 h \ 
ki ern ER in racemos subopespositoe multiarticulatos interdum spicas veras 
ite, homogamz v.-heterogame uni—2-flor®; gluma prima ecarinala, quarta 
semper RER Bishoi fragilis articuli incrassati facie interiori leviter excavati cum pedi- 
cellis iis accumbentibus v. adnatis cavum postice plerumque clausum pro recipienda spicula 
yes in quo gluma secunda omnino immersa est. 
5. Euandropogonee. Spieule in racemos subeompositos interdum uniartieulatos disposite, 
heterogams, uniflor& ; gluma prima ecarinata, quarta szpissime aristata. Rhacheos fragilis 
(rarissime tenaeis) artienli ut in Ischameis Sacchareisque., 3ıv 
y: 
Subtribus 1. — DIMERIE/E 
Characterem vide supra. — Subtribus distinetissima, Tristegineis 
arctissime affinis. Genus unicum : 
I. DIMERIA. R. Brown Prodr., p. 204. — Benth. et Hook. Gen. PI. 
3, p. 1128. — Haplachne J. S. Presl in C. B. Presl Reliqu. 
Henk. 1, p. 234. — Didactylon Zoll. et Mor. Syst. Verz., p. 99. 
— Psilostachys Steud. Synops. 1, p. 413. — Pterygostachyum Nees 
ap. Steud. Synops. 1, p. 413. 
Racemi solitarii v. gemini v. fascieulati, multispieulati, rhachi 
prorsus inarticulata, tenaci. Spicule breviter v. brevissime pedicel- 
late, a pedicello demum secedentes, anguste, uniflore, flore 8, 
sepissime aristate. Gluma prima sepius anguste linearis, secus 
nervum medium carinatum arcte complicata, chartacea v. OHNE, 
‘ Homogam:e vocantur spiculæ, ubi ambze cujusvis paris sexu, "oC, aristæ 
præsentia v. defectu congruunt, heterogamæ, ubi c— 
