RHYTACHNE. ^ ANDROPOGONEJE (AUCT. EDUARDO HACKEL). 271 
angulo costati, scabri, basi brevissime barbati. Spiculz sessiles cum 
callo anguste annuliformi rima profunda a reliqua gluma separato 
breviter barbulato 6—7 mm. longs, lineari-lanceolat&, alutacex; 
gluma I^* acuta, superne subobliqua, in aristulam rigidam 1—2 mm. 
longam (facile rumpentem) sensim abiens, marginibus anguste 
inflexis, flexuris non alatis superne aculeolato-ciliatis inferne murica- 
tis v. verrucosis, dorso planiusculo verruculis elevatis scaberrima, 
intus 3-nervis; II^ I^" subzquans, chartacea, lanceolato-elliptica, 
obtusiuscula, mutica, aeute carinata carina murieulata, 1—3-nervis, 
glabra; IH quam prima paullo brevior, lineari-oblonga, obtusiuscula, 
binervis v. subtrinervis, marginibus inflexis ciliatis; palea glumä 
multo brevior v. nulla; IV* seeundä '/, brevior, ovato-oblonga, acuta, 
ciliata, ejus palea glumä paullo brevior, lineari-oblonga, obtusiuseula, 
glabra. Antherz 3 mm. longæ. Pedicelli spicula sessili paullo brevio- 
res, lineares, complanati, obtusi, margine scabri, spieule rudimen- 
tum uniglume 1—1,5 mm. longum aristulatum v. subulatum ferentes. 
Africa tropica occident. ad fl. Gabun (Jardin in h. mus. Caönensis 
et in h. Boiss., Griffon de Bellay in h. Paris.). 
4. R. congoé&nsis; racemis sessilibus ; spieulis pedicellatis her- 
maphroditis v. neutris 3—4-glumibus quam sessiles vix v. parum 
brevioribus. — Jardinea eongoénsis Franch. in litt. 
Culmi teretes, glaberrimi, striati. Vaginse arctz, teretes, glaber- 
rimæ. Ligula margo angustissimus rufo-membranaceus glaber. La- 
mins e basi zquilata a vagina parum distincta anguste lineares, 
setaceo-acuminatz, 30—40 em. longs, 3—4 mm. late, rigidæ, glau- 
cæ, basi supra pubescentes et piliferze, ceterum glabre, praeter mar- 
ginem scabrum lives, costa media crassiuscula late albolineata, ner- 
vis lateralibus primariis utrinque 5—6, validiusculis, supra prominu- 
lis, secundariis singulis non prominentibus, omnibus confertis per- 
curse. Racemi 6—14 secus rhachos communis nodos approximatos 
(1—2 em. distantes) alterni usque terni, subfastigiati, ab ipsa basi spicu- 
liferi, 10—25 em. longi; rhacheos rectiusculz articuli spiculam sessilem 
superantes v. (in parte racemi superiore) sequantes, lineares, spiculis 
angustiores, dorso obtusangulo ad angulos scabri, basi glabri. Spicu- 
læ sessiles cum callo anguste annuliformi a reliqua gluma rima pro- 
funda separato glabro 6—7 mm. longe, lineari-lanceolatz, alutaces : 
gluma I™ chartacea, superne subobliqua, longe acuminata, s:epissime 
(saltem in spiculis inferioribus) mucrone v. setula terminata, margi- 
- nibus anguste inflexa, flexuris infra apicem scabro-eiliolatis, ceterum 
