Second Contribution to the Flora of Australia. 59 
*/,-1 mm longis truncatis plus minusve laceratis vel in lacinias cilii- 
formes apice solutis. Culmis gracilibus paucinodis erectis glabris usque 
supra medium foliatis sine panicula 28 cm altis; nodis glaberrimis. Foliis 
culmeis longe-vaginatis, vaginis culmum laxe amplectentibus paniculamque 
juvenilem obtegentibus, laminis convolutis longioribus, lamina folii supremi 
paniculam usque supra medium attingente. Panicula c. 16 cm longa 
latissima laxissima, basi ramos 4 verticillatos elongatos rigidiusculos pa- 
tentes usque plus 15 em longos gerenti; paniculae ramis caeteris paucis 
alternis subsimplieibus distantibus paucispiculatis, rachide ramisque pri- 
mariis glaberrimis laevibusque. Ramis paniculae infimis verticillatis ra- 
mulis secundariis elongatis patentibus distantibus gracilibus tantum parte 
superiori spiculas paucas gerentibus instructis. Spiculis solitariis longe 
pedicellatis, pedicellis saepe plus 1 cm longis, sed saepius spiculis 2 
approximatis, uno longe altero breviter pedicellato. Spiculis iis P. proluti 
similibus ca. 31/, mm longis, glumis minus rigidis nervis parum promi- 
nentibus pereursis, gluma I. ovato-lanceolata acuta 3-nervi spicula tertia 
parte breviori, glumis II. et III. acutis vel subacuminatis usque 4 mm 
longis, glumella conspicue breviori subacuta nitenti sub fructu oblonga 
tantum ca. 2!/, mm longa et vix mm lata, palea nulla. 
Queensland: Condamine River, coll. Hartmann. 
Bentham places the plant mentioned above under P. prolutum 
F. v. Muell., which is sufficiently distinct by its shorter and broader 
leaves (the flat lamina is as much as 4 mm broad), by its decompound 
panicle with numerous, slender, divided branches, the lower ones being 
clustered but not verticilate, by its numerous spikelets and by the very 
scabrous rhachis and rigid prominently nerved glumes. 
The plant from Armidilla (coll. Barton), which I have not seen, may 
prove to be the same species. 
13. Panicum Benthami Domin, nov. spec. 
P. trachyrhachi Benth. affine, sed excellit statura minori, foliis planis 
nune angustioribus tantum 2—2!/, mm latis nunc usque 7 mm latis 
mollioribus unacum vaginis glaberrimis laevibusque, margine laminae 
quoque laevi (nec ciliato-scaberulo), panicula decomposita sed breviori 
haud plus 3 dm longa, rachide ramisque paniculae parum scabris usque 
fere laevibus, spiculis longius pedicellatis, gluma prima gluma secunda 
non multum attamen conspicue breviori acuta sed haud aristulata. 
Queensland: Peak Downs (F. von Mueller); Springsure (Wuth). 
This species is included by Bentham under P. trachyrhachis var. 
tenuior, but is not identical with the latter variety, as the plant from 
Percy Islands, collected by A. Cunningham, belongs to a quite distinct 
and not allied species. The North Australian P. trachyrhachis is different 
from our plant, although there is a great similarity in the structure of 
the spikelets. The first outer glume in P. trachyrhachis tapers into a long 
point or a short, ciliated awn and is rather longer than the spikelets, 
the stems are exceedingly robust, the leaves scabrous, the panicle very 
