rolmmijdm. NAlADACEyE. iny 



rr%To'f Ir"'" '■ '• '''" '■ '"'■ "• ''■ ''"""' '"'"'■'' *^''»'"- '■" Li-na^a, ii. 197, 



ohtuso an.l snn.ow hut c,.,-ullato at thn apex, rouM.lo.l an.l das,; „. at l.aso, u.Kl„Iat..: 



don;,^ated: ln.it sein.c.rcular, 2 J.nos hnv^, acutely koolo.l, ..ronuiuMitlv l.oakod • 

 cnlnyo s ondcr, the cotyledon pointing to tl.e base of the radicle. - Cham. J c 19 " 

 t. o, hg. 14; lieiclienb. 1. c. 21, t. 33 ' 



Inl'li^' Pyf°lf *"S Linn. Stem more slender, not flexuou.s, branching: leave 

 a o^.'Ih r --I'^te-Ianeeolate, i to U, inches long, obtuse or acute,°claspin 

 atba.e; St. Hies sn.al ami not persistent: spikes rather loose a..d so.newhat ro„, 



in' 1 / ^ 1...0S long „r ra,-ely n.o,-e), o.i n.ostly short peduncles : fruit 



l.nnoni f ^ ^^^^^^olatus, liobbins. Leaves longer (2 to 4 inches or more), and mo.e 

 a.iceo ate, ac,..n.nate u..dnlate : pedu.icles thickened upward : fruit broader, nearly 

 oi-l)icular. — Gray, Manual, 488. ' "^ 



* * * Leaves all rnhmerrjed and unifonn, narrowli/ linear or setaceous, sessile. 

 •1- Stipules free from the narroiv base of the leaf. 

 ++ Flowers in a linear cylindrical spihe. 

 10. P. zosteraefolius, Schum. Stem flattened and somewhat win-ed branch- 

 ing : leaves g.-ass-l.ke, 3 to 8 inches lo..g by U lines wide, 3.nerved, abruptly acute 

 not narrowed oward the clasp. ng base ; stipules co..spicuous, obtuse : spike rathe 

 loosely flowered ^ to 1 inch long, shorter than the peduncle: fruit large (2 lines 

 ong), broadly oblong beaked by the stout style, somewhat undulate-keded • coty- 

 ledon nicurved. - Cha.n. 1. c. 182, t. 4, iig. 10 ; Iteicl.e.ib. 1. c. 17, t. 27 P Jn- 

 pressus, ir.es, not Linn. herb, nor Oeder ; Robbins in Grav's Manual, 488. 



li'fo^Sl °'.-firr°r'';" ''•'•*"■ ' ""r"!"^ '" ^Z*'""" (^^«^^' "• ''«^^' '-""I ^« I'e expected in NortI.e.n 

 : F , rj ' ^^'""■''' ""'' ^^' ""'■^''^''•" ^''•-^"^''^ States, but not con.mon, and in north" 



Califoinia 

 ern Euioiie. 



•H- -H. Spike subcapitate, or (in n. 13) often loose or interrupted. 

 on^-^" F' P^"«^i^O^"S, Pursh. Stem very slender, flattish, much branched, 8 to 

 20 inches high : leaves narrowly linear, 1- (obscurely 3-) nerve.l, an inch or two 

 long by rarely half a l.ne wide, acute, nari'owed at base ; stipules small obtuse be- 

 coming setose : spikes 2 - 10-seeded, on very short clavate flattened ped.incles • fruit 

 roundish, a lino long, abruptly beaked by the rather slender st.-aight style, and with 

 a more or less broad undulate-.lentate keel: embryo slender, with incurved cotyle- 

 don. _ Cham. 1. c. 170, t. 4, fig. 7. ^ 



i.. U.o'AUrnt-Ttator ''^'" ^ '•'^"^i-'"=« (C-^ammr,, G. F. Vasnj) ■ Or.^on (Hall, Ilonrll) ■ common 



12. P. Niagarensis, Tuckcrman. Stem often lo..g('r (1 to 3 feet)- Icave.s 

 larger, U to 3 A (about 2) inches long by a line wide or less, 3-5-norved at base, 



