Morris: Revision of Species of Plantago 111 



the Herbarium of the Missouri Botanical Garden, 39 in the 

 Columbia University Herbarium, 2 in the Herbarium of the Field 

 Columbian Museum, 12 in the Herbarium of the California 

 Academy of Sciences, 2 in my own herbarium. 



5. Plantago argyrea sp. no v. 



A dark green acanlescent annual \ generally silvery -silky, in age 

 becoming white silky -villous ; leaves basal, erect, numerous, linear 

 or slightly zvider above the middle, acute or tapering at the apex, 

 callous-tipped, entire, narrowed to the petiole having a slightly 

 expanded base, 50-100 mm. by 2-4 mm., 3 -ribbed, silvery-silky 

 zv hen young to silky -villous when old : scapes basal, erect, one to 

 several, surpassing the leaves, 1 00- 1 80 mm. high, finely silver- pubes- 

 cent : spikes erect, short to long-cylindrical, at lengtli interrupted, 

 15-60 mm. by 7 mm., long-villous : bracts rigid, herbaceous and 

 scarious-margined on one side or unequally on both sides, equalling 

 the calyx or shorter, narrowly lanceolate, acute, about 3 mm. long, 

 dark green or brozvn, villous: calyx villous, its divisions brozvn- 

 herbaceous and zvidely scarious-sidcd, oblong, rounded, 3 mm. long : 

 corolla surpassing the calyx, its lobes reflexed-spreading, two or 

 more tunes as long as the constricted throat, ovate, acute or nearly 

 obtuse, slightly sub-auriculate at the base, 2 mm. by 2.5 mm., white 

 to tawny ; stamens four, just exserted from the tube or on long 

 filaments : pyxis one third surpassing the calyx, oval, rounded, 3.5 

 mm. by 2 mm., circumscissile just belozv the middle: seeds two, 

 dark brown, oblong, finely pitted. 



Five sheets or specimens have been examined from Arizona, 

 as follows : 2 in the U. S. National Herbarium, 2 in the Her- 

 barium of the California Academy of Sciences, 1 in my own her- 

 barium. Type specimen is J. W. Tourney's no. 355c, from Castle 

 Creek, Arizona, June 21, 1892, in the U. S. National Herbarium. 



6. Plaxtago Helleri Small, Bull. N. Y. Bot. Gard. 1: 288. 



1899 



A low deep green annual, with a short erect stem, generally 

 villous : leaves alternate, ascending to erect, several to numerous, 

 linear to linear-spatulate, tapering to the acute apex, callous-tipped, 

 entire, narrowed to the margined petiole having a semi -clasping 

 base, 50- 1 60 mm. by 2-5 mm., j-j -ribbed or the ribs obsolete, loosely 

 to sparingly villous to glabrate in age : peduncles axillary, erect, 

 father stout, terete, solitary to several (then crowded), when crowekd 

 surpassed by the leaves, when few equalling or surpassing them, 



