282 MONOCOTYLEDONEJE. ROTTBOELLIA . 
nibus late implicata, carinis acutis spinuloso-eiliatis, ceterum laevius- 
cula; II“ I*» gequans, late lanceolata, acutissima v. acuminata, elevato- 
carinata; carina serrulato-scaberrima, dorso chartacea, margine 
membranacea, 3-nervis v. basi nervulis aliquot secundariis aucta ; II 
primä '/, brevior, ovato-lanceolata, membranacea, acuminata, 3-ner- 
vis ; ejus palea glumä angustior, binervis; floris J’ anther& 3,5 mm. 
longæ. Gluma IV: II” »quans, membranacea, ovata, mucronata, 
3-nervis, nervis lateralibus cum medio conniventibus; ejus palea 
glumam æquans, ovato-laneeolata, acuminata, membranacea, biner- 
vis. Lodiculæ cuneatze, inzequaliter dentatze. Ovarium glabrum. Styli 
breves; stigmata anguste linearia, usque 12 mm. longa, ssepe inferne 
coalita. Spiculæ pedicellate 7—8 mm. longa, a latere compresse : 
gluma I": acuta, carina media acuta superne spinuloso-ciliata munita, 
5-nervis ; reliqua ut in spiculis sessilibus ; stigmata ssepe tota longitu- 
dine coalita. 
Ad aquas, fossas, ete. Chin; borealis (Fortune 29), pr. Shanghai . 
et Woosong (ex Debeaux ; leg. etiam Wawra, in h. Vind.), pr. « Thu- 
schau » (Didrichsen in h. Havn.); in Japoniz ins. Kiusiu (Bürger) et 
Nipon (Savat. ex Franch.). 
Obs. 1. Rottb. foliata Steud. Synops. 1, p. 361, R. latifolia var. 
angustifolia Debeaux in Aet. Soc. Linn. Bord. ser. 3, vol. 10, p. 123 
est potius status macer loco sicco ortus quam varietas, nam non dif- 
fert nisi culmo 50—70 em. alto, laminis 10—30 em. longis 4—7 mm. 
tantum latis, racemis 2—3" v. immo solitariis. 
2. Species Ischemo :equo jure ac Rottbellie adjungenda; sed 
Rottbeellize digitat certe magis affinis est quam ulli Ischzemi speciei. 
3. R. speciosa ; rhachi communi infra racemum imum nuda ; 
spiculæ sessilis gluma I" dorso plana 11—13-nervi. — Ischemum 
speciosum Nees ! ap. Steud. Synops. 1, r 375; Andropogon speciosus 
Steud. 1. e. 
Culmi subgraciles, superne simplices v. raro ramum floriferum bre- 
vem agentes, inferne foliifero-ramosi, multinodes. Vaginæ inferiores 
hirtulæ, superiores glabræ v. apice et faucibus tantum pilosæ. Ligula 
ad marginem angustissimum membranaceum ciliolatum redacta. 
Laminæ e basi parum angustata lineares, 10—30 cm. longæ, 5— 
10 mm. lat, flaccidulæ, virides, utrinque pilis basi tubereulatis hispi- 
dulæ v. superiores glabrescentes, margine scaberrimæ. Racemi 3—7, 
(rarissime solitarii) secus rhacheos communis nodos 1—2 èm. distan- 
tes alterni, inæquales, 5—10 cm. longi, subgraciles, laxiuseuli, glabri, : 
