GRASS FAMILY 9o 



Kefs. ECHINOCHLOA COLONA Link, Hort. Berol. 2 : 209. 1833. Panicum colonum L. Syst. Nat. 

 ed. 10. 2: 870. 1759; Thurb. in Wats. Bot. Cal. 2: 260. 1880; Abrams, Fl. Los Ang. 24. 1904. 



9. SETARIA Beauv. FOXTAIL. 



Spikelets as in Panicum but subtended by few or many persistent awn-like 

 branches, arising from the rachis below the articulation of the spikelets. 

 Annual introduced weeds, or native perennials, with cylindrical spike-like 

 bristly panicles. (Latin seta, a bristle.) 



Perennial ; panicle slender 3. S. gracilis. 



Annual; panicle stouter. 



Bristles tawny, 5 or more below each spikelet 1. S. glauca. 



Bristles green or purple, 1 to 3 below each spikelet 2. S. viridis. 



1.' S. glauca Beauv. Annual; culms branching at the base, compressed, 

 erect or ascending, 1 to 2 feet high; blades flat, with a spiral twist; panicle 

 dense, oblong, 1 to 3 inches long; bristles 5 or more, 2 to 4 lines long, tawny- 

 yellow; spikelets 1% lines long; fruit undulate-rugose. 



A native of Europe, commonly introduced into the U. S. A weed in fields 

 and waste places.^ Rare in California: Riverside, Wilder 1043, 1127; Sacra- 

 mento, ace. Thurber; Fresno, ace. Davy; Los Angeles, ace. Abrams. 



Refs. SETARIA GLAUCA Beauv. Ess. Agrost. 51. 1812; Thurb. in Wats. Bot. Cal. 2: 260. 

 1880. Panicum glaucum L. Sp. PI. 57. 1753. Chaetochloa glauca Scribn. U. S. Dept. Agr. 

 Div. Agrost. Bull. 4: 39. 1897; Davy in Jepson, Fl. W. Mid. Cal. 33. 1901; Abrams, Fl. Los 

 Ang. 25. 1904. 



2. S. viridis Beauv. Annual; culms 1 to 2 feet high; blades flat, not 

 twisted ; panicle oblong-ovate, 1 to 2 inches long ; bristles 1 to 3, slender, 3 to 

 6 lines long, green or purple ; spikelets 1 line long ; fruit faintly wrinkled. 



Introduced from Europe; a common weed in the Eastern States, rare in 

 California (Rialto, Parish 2112, the only specimen seen). 



Refs. SETARIA VIRIDIS Beauv. Ess. Agrost. 51. 1812. Panicum viride L. Syst. Nat. ed. 

 10. 2: 870. 1759. CJiaetochloa viridis Scribn. U. S. Dept. Agr. Div. Agrost. Bull. 4: 39. 1897. 



3. S. gracilis H.B.K. Perennial; culms erect, 3 to 4 feet high; blades 

 elongated, narrow, 1 to 2 lines wide, flat or folded; panicle slender, linear, 3 

 to 4 inches long, about iy 2 lines thick ; bristles 5 to 8, twice as long as spike- 

 let, pale or tawny; spikelets 1 line long; fruit undulate-rugose. 



Fresno, Griffiths 4717; Riverside, Reed 1186; east to Florida and south into 

 Mexico. 



Refs. SETARIA GRACILIS H.B.K. Nov. Gen. fe^ Sp. 1:*109. 1816. Chaetocliloa gracilis 

 Scribn. & Merr. U. S. Dept. Agr. Div. Agrost. Bull. 21: 15. 1900. 



S. IMBERBIS Roem. & Schult. (Chaetochloa imbcrbis Scribn.) is reported from 

 Los Angeles, Santa Ana, and San Bernardino by Abrams (Fl. Los Ang. 25. 

 1904). 



PENNISETUM VILLOSUM R. Br. A perennial with culms 1 to 2 feet high, 

 villous below the panicle, and dense soft feathery terminal spikes, 1 to 3 

 inches long; spikelets surrounded by an involucre of several slender plumose 

 bristles about an inch long, the cluster falling from the axis entire. A native 

 of Abyssinia, cultivated for ornament and occasionally escaped from gardens. 

 Santa Barbara Co., Eastwood in 1908, Chase 5600. 



LEERSIA ORYZOIDES Swartz. Prodr. 21. 1788; Thurb. in Wats. Bot. Cal. 2: 262. 

 1880. Phalaris oryzoides L. Sp. PI. 55. 1753. Homalocenchriis oryzoides Poll. 

 Hist. PI. Palat. 1 : 52. 1776. Cache Creek, Lake Co.. Bolander (no. 2418 in the 

 Gray Herbarium), "introduced." San Bernardino, Parish in 1885, "probably 

 introduced." 



