PIPER FLORA OP THE STATE OF WASHINGTON. 487 



Upper pair of stamens longer than the lower. 



Anther cells parallel Agastaciie (p. 489) 



Anther cells divergent. 



Calyx teeth subequal Nepeta (p. 489). 



Calyx teeth unequal, the upper very 



large Dracocei'iialum (p. 489). 



Upper pair of stamens shorter than the lower. 



Calyx bilabiate Prunella (p. 489). 



Calyx not bilabiate. 



Teeth of the calyx 10, spiny Makrubium (p. 489). 



Teeth of the calyx 5, not spiny. 



Flowers opposite; calyx becom- 

 ing inflated Physosteglv (p. 490). 



_ , ' Flowers whorled; calyx not be- 



coming inflated. 



Throat of corolla dilated . Lamium (p. 490). 

 Throat of corolla not dil- 

 ated Stachys (p. 490). 



Corolla nearly regular, or wnen bilabiate, the upper lip plane. 



Corolla regular or nearly so. . 



Antheriferous stamens 2 Lycopus (p. 491). 



Antheriferous stamens 4 Mentha (p. 492). 



Corolla bilabiate. 



Plant creeping; flowers axillary Micromeria (p. 493). 



Plant erect; flowers capitate- verticillate Madron ella (p. 493.) 



TRICHOSTEMA. 



Corolla tube not exceeding the calyx; leaves membranaceous, costate- 



veined 1. T. ohlongum. 



Corolla tube slender, exserted; leaves crowded, strongly 3 to .5-nervose. 3. T. lanceolatum. 



1. Trichostema oblongum Benth. Lab. 659. 1832-36. 



Type locality: "In lierbidis prope arccm Vancouver." Collected by Douglas. 

 Range: Washingtoji and Idaho to California. 



Specimens examined: Falcon Valley, Suksdot f S4; without locality, Douglas; Pullman 

 Piper 1874; Hull, July 16, 1892. 



Zonal distribution: Arid Transition. 



2. Trichostema lanceolatum Benth. Lab. 659. 1835-36. 



Type locality: "Prope arcera Vancouver in siccis ad flumen Multnomah ot in Nova Cali- 

 fornia." Collected by Douglas. 



Range: California, Oregon, Washington? 



It is very doubtful if this plant occurs north of the Columbia River. The above state- 

 ment of Douglas in Hooker's Flora is the only direct evidence. 



TETJCRIUM. 



1. Teucrium occidentale A. Gray, Syn. Fl. 2': 349. 1878. 

 Type locality: Nebraska. Collected by Hayden. 

 Range: Washington to California, New Mexico, and Nebraska. 

 Specimens examined: Coulee City, Henderson 2533; Toppenish, Griffiths cfe Cotton 769. 



la. Teucrium occidentale viscidum subsp. nov. 



Difl^ere from T. occidentale in being viscid-pubescent throughout. 



Collected at Mission, Stevens County, in muck land, August 22, 1902, by Frank O. Krea- 

 ger (no. 482). The type is the sheet in the U. S. National Herbarium no. 441297. 



