308 MONOCOTYLEDONER. ROTTBOELLIA. 
ibique a culmo solutx et secus carinam subeonnale, — Culmi robusti, A m. v. ultra alti, eompressi. 
Vagine MEIN bench LX a et equitantes, superne more Mun Grete ur a 
ad mediu superior ternodiis breviores, summa ramoru m lam nn: rudim 
D ben peser al uu AE she deve in va ginam de ecurrente te elon Beate Dinge 
e, 4— ON m. late, aes v — rigidula, subtus ad nervos S wie ^3 ieviusenle, i 
ais Y abera argine scabrz. Rac icti, glabri; articuli crassi (diam. EN m.), dorso 
convexo plus minus ea Err S aberüll facie iex eisi p ex xcavati, "disjuneti apice cavilatem semiorbi- 
— conicam exhibentes. Spiculæ sessiles ovatæ, cum callo anguste Audioi née prom:nente 
3 reliqua glum a depressione. € sulco) separato 5—6 m erh nge grn = ipee exacte 
sch dent tes, gium is glabri = anb. intus ink M x MIN is s e cha cularis, 
acuta; 111° hyalina, ovata, iata. vacua; IV* itu. late ovata, plic cato- arh e dirt m nervis; 
palea m een r, enervis. An there 2-3 mm. Jongz. Styli pans æquantes Embryo c aryop- 
seos 9/3 x Pedicelli articulos equantes, fere duplo angustiores; spiculz ag pate: sessilibus 
rie tn ^ "plus duplo bt rn ee perfecte : gluma I* ahere. tantum tatere per totum 
decursum marginis alata, dorso lævis v. leviter rugulosa ; II” æque coriacea, superne alata, reliqua 
ut in rl sessilihns, ‚al e ne (ovario hebetato) C, v. neuter, rarius glumæ Te, IV*, flos 
94, 95 
( E 
24. R. rugosa (Nutt. Gen. 1, p. 84); racemis ad cujusvis articuli 
basin constrictis inde nodosis; gluma I»: spiculæ sessilis rugis 2—3 
transversis valde elevatis undulatis v. interruptis verrucisque paucis 
auctis notata; pedieellis valde clavatis supra basin depressis. — 
Hemarthria ? rugosa Kunth. Révis. Gram. 1, p. 153. 
Rami floriferi ad culmi nodos superiores 2—3", longiuseuli, simpli- 
ces v. ramulos secundarios 1—2 agentes, ereeto-patuli. Racemi 4—5 
em. longi, crassi, subeompressi, sursum subinerassati, basi subexserti 
v. breviter vaginati, rufescentes v. alutacei; articuli spicula sessili '/,- 
subduplo breviores, plus minus elavati, eurvuli, supra basin ad mar- 
gines exeisi et dorso ibique depressi. Spiculz sessilis gluma I? ab '/, 
inferiore angustata, obtusa, emarginata, carinis a basi ad apicem et 
ultra anguste alatis; Il“ primá parum brevior, elliptica, carinä 
anguste alata; HF adhue brevior, enervis; IV* quam Il“ '/, brevior, 
obtusa. 
a, genuina. Rugz continux, paucis verrueis auctis. Racemi valde 
- nodosi. 
B, Chapmani; ruge plerumque interruptæ, rugulis longitudinali- 
bus multo minus distinctis v. obsoletis verrueisque solitariis inter- 
jectæ. Racemi minus distincte nodosi. Rami floriferi graciles, elon- 
gati. — R. rugosa Chapm.! FI. South. Un. St., p. 579. 
America bor. : Maryland (Commons), Delaware (Canby), Carolina 
sept. (Curt.), Georgia (ex Nutt.); var. B, in Florida (Cl (Chapm., Cur- 
tiss 3622). 
Obs. var. 8, transitum in speciem sequentem fortasse melius sub- 
speciem habendam indigitat. 
25. R. corrugata (Baldw. in Sill. Amer. Journ. 1 (1819), p. 355); 
racemis æquis (ad rhacheos nodos non constrietis); spieule sessilis 
gluma I"* rugis transversis brevibus cum longitudinalibus que ele- 
vatis reticulatim intertextis notata, inter rugas (interdum depressas - 
