SCHEDONNARDUS— SPOROBOLUS 361 



Stems .5-1.5 ft. high; spikes 2-4 in. long; spikelets 2- 

 3 mm. long vS. paniculdtus 



Scleropogon Philippi 1860 

 (Gr. skier os, stiff, pogon, beard) 

 Spikelets dissimilar, dioecious, in a narrow panicle, staminate spikelets 

 flattened, linear, 10-14-flowered, with lanceolate, acute glumes and a 3- 

 toothed lemma equalled by the palet ; pistillate spikelets linear-oblong, 3-5- 

 flowered ; glumes lanceolate, the upper larger ; lemma cylindric, enclosing 

 the palet ; joints of the axis, 5-nerved, the 3 main nerves ending in 3 long 

 twisted awns. 

 Stems tufted, 4-12 in. high; staminate spikelets 1-3 cm. 



long, pistillate 1-2 cm. long S. karzvinskianus 



Sorghum Per soon 1805 Johnson Grass 

 (The Indian name) 

 Spikelets in pairs at the joints, or in 3's at the ends of the branches of 

 terminal panicles; one spikelet, sessile and perfect, the lateral stalked, stam- 

 inate or empty ; glumes 2, the outer hard and shiny ; sterile lemma present ; 

 lemma awned, enclosing a small palet and perfect flower, or the palet some- 

 times lacking; annual or perennial. 

 Stems 3-5 ft. high; panicle .5-1.5 ft. long; sessile spike- 

 let 4-6 mm. long, the awn 8-15 mm. long 6\ halepense 



Spartina Schreber 1789. Cord Grass, Slough Grass 

 (Gr. spartinos, cord-like, from the leaves of some species) 

 PI. 46, fig. 4. 

 Spikelets 1 -flowered, jointed with a pedicel below the glumes, in 2 rows 

 on the axis of 1-sided spikes, the latter in raceme-like clusters ; glumes 2, 

 unequal, keeled ; lemma keeled, palet often longer, 2-nerved ; marsh peren- 

 nial. 



1. Lower glume equalling the lemma, upper glume 



awned ; stems 3-6 ft. high ; spikes 5-20, 2-5 in. 



long 5. cynosuroides 



2. Lower glume, acute, shorter than the lemma, up- 



per glume not awned; stems 1-3 ft. high; 



spikes 4-8, 1-2 in. long S. gracilis 



Sporobolls Robert Brown 1810 Rush Grass 

 (Gr. spora, seed, bolos, throw T n, from the deciduous grain) 

 PI. 46, fig. 14. 

 Spikelets 1 -flowered, in panicles; glumes 2, equal or unequal; lemma 



