/ 



THE IDENTIFICATION OF WALTERS GRASSES. 



43 



atum 



spica composita spiculis 10 s. 11 secundis, 

 alternis, basi villosis, ordine quadruplici, 

 pedunculis bifloris, culmo suberecto; caly- 

 cibus aequalibus, fol. longis purpuras- 

 centibus intus ad fauceni subvillosis. 



This is identified by the several spikes, villous at base, 

 the spikelets in four rows and the purplish leaves, and 

 is probably P. Boscianum Fliigge (P. purpurascens 

 Ell.). Elliott gives P. virgatum Walt, not L. as 



i 



synonym of his P. purpurascens. Pursh refers Walter's 

 plant doubtfully to P. Floridanum Michx., which it 

 can scarcely be, as the spikelets of the latter are not in 

 four rows. . Linnaeus' description is "P. spiculis panic- 

 ulatis alternis basi villosis." 



35. Syntheris 



Crop-grass vulgo. 



Cal. 1-florus, 2-valvis: valvulis planis, 

 acutis interiore minora recta, exteriore 

 lateribus corollam subamplexante. Cor. 



2-valvis : valvulis 



magnitudine et figura 



valvulae majori calycis simillimis. 

 Stam. fillamenta tria capillaria. Antherae 



oblongae. 



Pist. 



germen 



subrotundum. 



Styl 



duo 



capillares, longitudine 

 plumosa. 



floris. 



Stigmata 



Per. nullum. 



Semen unicum, calyce corollaque persisten- 

 tibus vestitum. 

 praecox 1. culmo decumbente, laevi, subtereti, geniculis 



in aquosis radicanti ; f oliis collo et f auce 

 - villosis ; spica composita spiculis oppositis 

 erectis linearibus secundis ; dentibus 

 bifloris; flore altero sessili. 



[P. 76] 



