76 GR AMINE AE. 51. Diplachne. 



3. T. aristata, J. M. Black. Like the preceding, but the panicles are shorter and straw- 

 colored ; outer glumes 12-14 mm. long, about as long as the flowers and acuminate in a 

 short mucro ; flowering glume with 2 acute lobes and a mucro or short awn exceeding 

 them (2-3 mm. long). Resembles Festuca littoralis. 



Everard Range. 



4. T. lanata, J. M. Black. Leaves slender, subulate, pungent, woolly towards the base 

 and on the sheaths ; panicle narrower, but rather loose ; spikelets ovate, 5-7-flowered, 

 straw-colored, densely woolly or silky- villous ; outer glumes 10 mm. long, 3-nerved, 

 silky ; flowering glume silky nearly to the summit, the mucro about as long as the 2 

 lateral lobes or teeth. 



Minnipa, E. P. 



Plate 3. — 1, flowering glume ; 2, palea ; 3, pistil stamens and lodicules. 



51. DIPLACHNE, Beauv. 



(Greek diploos, double ; akhne, a glume : the flowering glume is 2-lobed.) 

 Spikelets several-flowered, sessile or almost so, in simple or paniculate spikes ; outer 

 glumes 2, keeled ; flowering glume rounded or flat on back, closely imbricate, scarious, 

 ending in 2 short lobes with a short point or awn between them ; palea broad, flat ; ligule 

 membranous, jagged. 



Spike slender, simple D. loliiformis 1. 



Spikes arranged in a simple panicle D. fusca 2. 



1. D. loliiformis, F. v. M. Small erect annual ; leaves very narrow, the sheaths broad 

 and whitish ; spike 2-8 cm. long, 1 -sided ; spikelets narrow, almost cylindrical, erect, 

 appressed, 5-10 mm. long ; flowering glume 3 mm. long, hairy at base, the midnerve 

 prolonged in a short awn exceeding the lateral lobes ; grain fusiform.*"" 



Far North, in wet depressions. Most of the year. 



2. D. fusca (L.), Beauv. Rather tall perennial ; leaves long, with loose sheaths ; 

 panicle narrow, 10-40 cm. long, with erect branches ; spikelets compressed dorsally, 

 almost sessile, whitish or lead-colored, 6-14-flowered, 10-15 mm. long ; midnerve of the 

 flowering glume produced into a point shorter or a little longer than the lateral lobes, 

 the nerves silky-ciliate in the lower half ; palea also ciliate with long hairs on the nerves ; 

 seed obovate, pericarp loose. 



Far North ; Murray lands. 



Var. Muelleri. Spikelets almost white and apparently broader, owing to the flowering 

 glumes being more flattened dorsally ; ciliation dense at base of flowering glume. — D. 

 Muelleri, Benth. 



Flinders Range and Far North. 



52. PHRAGMITES, Trin. 



(Greek phrag mites, growing in hedges : plants crowded together in a row along the 



water's edge.) 



I. Ph. communis, Trin. Common Reed. Stout perennial, 1-3 m. high, with long leaves, 

 1-3 cm. broad, covering the stem ; spikelets 3-7-flowered, in a large, branching, brownish 

 panicle, 15-30 cm. long, silvery from the long silky hairs which rise from the rhachilla 

 and envelop the flowers ; outer glumes 2, membranous, keeled, acute, unequal, shorter 

 than the flowers ; flowering glumes membranous, acuminate with long soft points. — 

 Arundo Phragmites, L. 



Banks of the Torrens ; Reedbeds ; beside creeks throughout the cooler districts ; 

 often growing along with Typha angustifolia. 



53. LAMARCKIA, Moench. 



(After the French naturalist, J. B. de Lamarck, 1744-1829.) 



* 1. L. aurea (L.), Moench. Small glabrous annual; spikelets of 2 kinds intermixed 

 on the panicle -branches ; the fertile ones with 1 bisexual flower, of which the flowering 

 glume is 2-toothed and awned, just below the notch, and 1 stalked empty glume above 

 it, also with a slender awn ; the sterile spikelets consisting of 2 lanceolate outer glumes 

 (like those of the fertile spikelet), and 6-9 obovate imbricate empty glumes ; panicle 

 unilateral, spikelike, ovate-oblong, golden. — Cynosurus aureus, L. 



Murray district ; Flinders Range. Oct. -Mar. — Mediterranean region. 



54. CYNOSURUS, L. 



(Greek kynos, of a dog ; oura, tail : shape of the panicle.) 



* 1. C. echinatus, L. Rough Dog's-tail. Erect annual ; spikelets of 2 kinds as in 

 Lamarckia, but the f rtile ones with 2-3 bisexual awned flowers, surrounded by the sterile 

 spikelets, which consist of numerous rigid lanceolate awned glumes, arranged in 2 opposite 

 rows; panicle ovate or oblong, 1^-3 cm long, dense, very bristly; flowering glume 

 5 -nerved. 



Roadsides, Mount Lofty and Stirling. Oct. -Dec. — Mediterranean region. 



