HORTU6 GRAMINF.US WOBURNENSIS. 49 



PANICUM divaricatissimum, aint. 



Brownii, ami. Brown's, nat. New Holland. 

 ****** Spiked, spikes digitate, bundled, solitary, exterior 

 valve of the husk very small, or none. 

 papposum, ami. woolly-flowered. 

 tcnuijlorum, ami. fine-flowered. 

 propinquum, ami. allied. 

 gibbosum, ami. gouty. 

 ******* Exterior flowers masculine, inner feminine, smaller, 

 spike-stalk apex naked, awn-like, aquatic, culms 

 creeping. 

 paradoxnm, ami. paradoxical. 

 spinescens, ami. spiny. 

 New Species discovered by Humboldt and Boiipland. 



1. Spikes solitary, spikelets solitary, two-rowed. 

 rottboelloides, per. hard grass-like, nat. S. America. 



2. Spikes solitary, spikelets in twos, flowering on one 



side. 

 monostachyum, per. single, nat. S. America. 



3. Spikes verticillate, bundled, or panicled, much digi- 



tated, or fingered. 

 ascendens,per. ascending, nat. S. America. 



4. Panicled, spikelets conglomerate. 

 decolorans, per. various-coloured, nat. S. America. 



5. Spikelets of the panicle spreading, or scattered. 

 divergens, per. diverging, nat. S. America. 

 olyroides, per. amel-corn-like, nat. S. America. 

 aturense, per. blackish, nat. S. America. 

 glaucescens, per. glaucous, nat. S. America, 



Sect. IX. Grasses with three stamina, two styles, several 

 flowers ill each calyx (except spartina), flowers all bisexual, 

 the terminating floret frequently unisexual or barren. 



LOLIUM. Ray-grass, or darnel. Generic character : crt/ya- 

 of one valve, lateral, fixed, pressing a spikelet of flov/ers 

 close to the rachis, or spike- stalk ; coro//a two-valved, 

 spear-shaped, exterior valve near the apex, sometimes 

 awned ; seed covered with the corolla husks, convex on 

 one side, and furrowed on the other, 



£ 



