310 
**Racemes bare at the base for at least 
3 cm. (often for 10 or 12.cm.), the lowest 
whorled : 
Spikelets 2-2-5 mm. long : 
Spikelets clothed with long silky hairs 
up to 2 mm. long - - 
Spikelets glabrous = - - - 
Spikelets 3-5-4-5 mm. long : 
Spikelets softly pubescent or glabrous : 
Leaves and sheaths woolly pubes- 
cent; upper glume as long as the 
spikelet - - - - 1 
Leaves and sheaths more or less 
glabrous or glabrescent; | upper 
glume often slightly shorter and 
narrower than the spikelet - 20. divaricatissima. 
Spikelets with tubercle-based hairs 
along the nerves of the lower valve - 21. macractenia. 
1. D. ctenantha (F. Muell.) Hughes nov. comb.; Panicum 
ctenanthum F. Muell. Fragm. vii. 153 (1874); Benth. Fi. 
Austral. vii. 469. 
W. Avsrratia: Dampier’s Archipelago, Walcot ; Mons 
Cupri, Whim Creek, Mitchell ; Sturt’s Creek, Jfueller. 
2. D. robusta Hughes nov. sp. 
Annua, usque ad 60 em. alta inflorescentia inclusa. Culmt 
erecti vel geniculato- -ascendentes, multinodi nodis exsertis glabris 
inferioribus radicantibus. Foliorum vaginae solutae, glabrae, 
ore longe barbatae ; ligulae ovatae, membranaceae, 1-5 mm. 
longae, glabrae; laminae planae, circiter 12 cm. longae, 0-4 cm. 
latae, glabrae vel pilis paucis tenuissimis basi tuberculatis 
indutae. Racemi 3, digitati, usque ad 20 em. longi; rhachis 
breviter alata; 0-8 mm. lata.. Spiculae 2-nae, 4 mm. longae, 
anguste ovato-oblongae. Gluma inferior nulla; superior 3 mm. 
longa, ovata, acuta, sericeo-hirsuta. Anthoeciwm inferum ad 
valvam spiculam aequantem 5-nervem reductum nervis lateralibus 
ciliis rigidis basi tuberculatis indutis: Anthoeciuwm superum ¢; 
anguste ovato-oblongum, albidum 
N. Trerrirory: Melville Island “sandy soil near ‘beach ”’, 
Hill 189 !. 
3. D. longiflora (Retz.) Pers. Syn. i. 85 (1805); D. tenuiflora 
Beauv. Agrost. 51 (1812); D. Pseudo-Durva Nees, Fl. Afr. Austr. 
21 (1841); Paspalum longiflorum Retz. Obs. iv. 15 (1786); 
P. brevifolium Fluegge Monogr. 150 (1810); Benth. Fl, Austral. 
vii. 461; Panicum tenuiflorum R. Br. Prod. 193 (1810); P. pro- 
pinquum R. Br. 1. ¢.; P.: Steudelianum Domin ‘in: Biblioth. 
Bot. mo 296°(1915) ; Syntherisma longi fore Skeels in lel “ Dep. 
Agric. Bur. Pl. Ind. Bull. 261. 30 (1912). 
N. Teeee McAdam Range, Mueller. 
— 
=] 
ammophila. 
. tonsa. 
—_ 
lo 6) 
. coenicola. 
i) 
