1 66 PATAGONIAN EXPEDITIONS: BOTANY. 



vose, scabrous. Female panicle axillary, short-peduncled, rigid, its axis 

 sulcate, angular, its branches crowded, strict, at length basi-refracted. 

 Branchlets erect ; no terminal spikelet. Male panicle patulous, after flow- 

 ering contracted. Glumes pellucid. 

 (S. Brazil) ; Chubut, wet places. 



10. ZIZANIOPSIS Doll and Ascherson. 



Tall, aquatic, monoecious grasses with long flat leaves, and i -flowered 

 spikelets in panicles, the female terminating the branches, and the males 

 below. Scales 2, subequal, the outer one in the female spikelet broad, 

 acute, awned. Stamens 6. Styles united. Grain subglobose, separable 

 from the pericarp, 3-ridged. (Fig. in Brit. & Br. i, 128.) 



Temperate and tropical America. Species 2. (Z. miliacea in U. S. and 

 Brazil.) 



Z. BONARIENSIS (Bal.) Speg. 



(Buenos Aires) ; N. Patagon., in wet places along Rio Colorado. 



ii. ANTHOXANTHUM Linn. Sweet-scented Vernal Grass. 



Fragrant grasses with flat leaves and spike-like panicles. Spikelets i- 

 flowered, narrow, compressed. Glumes 5, the two lowest acute or short- 

 awned, the lowest one the shortest ; the third and fourth empty, hairy, 

 2-lobed and awned dorsally ; the floral glume and palea small and obtuse. 

 Stamens 2. 



Species 5, European. 



A. ODORATUM Linn. 



Glumes 3 and 4 hairy, the third with an awn twice its length, inserted 

 half-way up ; the fourth with an awn inserted near the base and twice as 

 long. 



(Europe, naturalized in N. Amer., Brit. &. Br. i, 131.) Magellan 

 (Dusen). 



12. HIEROCHLOE Gmelin. (Savastana Schrank.) 



Aromatic grasses with contracted or open panicles and flat leaves. 

 Spikelets 3-flowered, the terminal flower perfect, the others staminate. 

 Glumes 5, the 2 lower subequal, acute, glabrous, the next 2 shorter, obtuse 

 or 2-lobed, each enclosing a palea and 3 stamens; the fifth often awned, 

 enclosing a palea and a perfect 2-staminate flower. 



