f 



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TRIxVNDRiA DIGYNIJC H^ 



We have of this plant three very distinct varieties, 



1. Glaucam ? plant ,2;iowing in small detached bunches, 12 — 18 

 inches high- Stem and leaves erect. Leaves on the upper surface 

 glaucous; spikelets 1 flowered; rachis pubescent, almost tomentose j 

 awn sometimes tinged with purple. 



2. Flavescens. Stem procumbent^ taking root at the lower joints, 

 2 — 3 feet long; leaves Ion";, decumbewt ; rachis villous j spikelets 1 

 flowered ; the whole plant has a yellow hue. 



3. Purpurascens. Somewhat decumbent, 12 — ^5 inches high; 

 leaves short, expanding, upper part of the stem nak<*d ; spike small ; 

 racliis hirsute; spikelets frequently 2 flowered ; transverse wrinkU-s 

 of the seed much coarser in this than in the preceding varieties ; awns 

 purple, and the glumes of the mature seed- 

 species, 

 een P. 



glancum and germanicum. He however omitted it in his catalai»:ue, 

 and I have for the present arranged it here. 



Grows. The 1st. near Charleston, appearing to prefer the vlcinitj^ of 

 salt water ; tlie 2d every where excepting in inundated lands ; the 3d. 

 in dry sandypastures ; on Paris Island, common. Found also ou 

 Charleston neck. 



Flowers through the whole summer. Glaucous Panicunu 



Dr. Muhlenberg once considered this variety as a distinct S] 

 which he proposed to call P. medium, as intermediate betwe 



4. CORRUGATUM, E 



P. spica tereti, compo- | Spike terete, corapoiind 



setosa; spiculis iiuiU bristly; spikelets mduy 



tifloris (7—10) 



transverse ruffosis, E 



flo\vered,(7— -10)j corol 



ly rugose. 



Stem 2 — 3 feet high, terete, slightly scabrous. Leaves 8 — 12 inches 

 long, 3 lines wide, acute, very scabrous ; upper sheaths Ion "-er t: an 

 the joints, scabrous; stipules haiiy. Floivers in a compact, terete 



spike, 6 inches lonff, composed of many appressed spikelets; 7 U) 



fertile flowers, and as many sterile on each splkelet, Involucrum 

 abnstle at the base of each floret, wliether sterile or fertile, 5 or 4 

 tunes as long as the floret. Calyx 3 valved ; accessary valve half as 

 long as the proper valves, all 3 nerved .Corolla as long as the cal vx • 

 exterior valve and the seed transversely wrinkled. Jinfhers and oth^l 

 mas dark purple 



Tins species has nmch resemblance to the P. Italicum, but is smaller 

 and Its flowers have the structure of the P. glaucum. 

 ^ent to me from Savannah by Dr. Baldwin, 

 Flowers 



TFrinkled 



Italicum 



^ P. spica composita, basi I Spikes compressed nod. 

 interrupta^ nutante ; spi- ding, interrupted at base ; 



cuUs glomeratis ^ involu. [ sjiikdets clustered : in\Q. 



u 



