138 COULTER AND ROSE 



8. Tauschia humilis C. & R., sp. nov. 



Weak caulescent, from tuberous thickened roots, glabrous except 

 in the inflorescence; leaves and peduncles more or less decumbent, 



1 to 2 dm. long ; lower leaves 5-7 cm. long, twice to thrice pinnate, the 

 ultimate segments linear and entire; involucre none or of a single 

 elongated bract ; involucel of several linear, distinct, entire bractlets ; 

 rays 5 or 6, about 2.5 cm. long; fruiting pedicels very short, 1-2 mm. 

 long, sterile pedicels longer; flowers yellow; fruit glabrous, ovate, 



2 mm. long ; oil-tubes sev^eral in the intervals. 



Hidalgo : Sierra de Pachuca, altitude 2940 meters, Pringle 6954, 

 August 4, 1898; same station, Prmgle 7896, October 6, 1S99. 



9. Tauschia madrensis C. & R., sp. nov. Plate V. 



Acaulescent from thick elongated roots; leaves 5 to 10, 5 to 12 cm. 

 long, bipinnate; ultiiuate segments small, somewhat ovate in outline, 



3 to 5-toothed or cut, glabrous except the rachis and some of the larger 

 veins; scape i to 3 dm. long, erect or nearly so, longer than the 

 leaves; inflorescence slightly puberulent ; involucre none; involucel 

 of several oblong-linear, distinct, entire bractlets longer than the pedi- 

 cels; fruiting rays 3 or 4, nearly equal, 10 mm. or less long; pedicels 

 very short, 2 to 3 mm. long; fruit glabrous, strongly flattened later- 

 ally, broadly ovate, rounded at base, 4 mm. long; oil-tubes several in 

 the broad intervals. 



Tepic : swampy meadows on top of the west range of the Sierra 

 Madre near Santa Gertrudis, Rose 2103, August 8, 1897. 



10. Tauschia nelsoni C. & R., sp. nov. 



Short caulescent, 2-3 dm. high, glabrous; lower leaves 10-15 cm. 

 long, twice to thrice pinnate, the linear and entire segments crowded ; 

 involucre none or of a single short scarious bract; involucel of several 

 short, ovate to orbicular, mostly toothed bractlets; rays 8 to i3, 10-15 

 mm. long; pedicels very short, about i mm. long; flowers yellow; 

 fruit glabrous, ovate, 4 mm. long; oil-tubes several in the intervals. 



Durango : near El Salto, Nelson 4561, July 12, 1898. 



11. Tauschia linearifolia C. & R., sp. nov. Plate VI. 



Acaulescent or nearly so, from thick elongated roots ; leaves 6 to 13, 

 erect, 8 to 20 cm. long, linear, slightly tapering at base into slender peti- 

 oles, acute, margin entire and slightly revolute, glabrous, pale, paral- 

 lel-veined ; peduncle or scape shorter or longer than the leaves ; invo- 

 lucre wanting or of a single bract, and involucel of several bractlets, 

 both orbicular and acuminate, strongly nerved and purplish, 3 mm. in 

 diameter; rays 6 to 10, nearly equal, short (5 to 6 mm.) long; fruit- 

 ing pedicels i mm. long, sterile ones longer; fruit strongly flattened 

 laterally, broadly ovate, cordate at base, slightly tapering at apex, 6 

 mm. long, 4 mm. broad; oil-tubes several in the broad intervals. 



Tepic : in a swamp on top of the west range of the Sierra Madre 

 near the little Indian hamlet of Santa Gertrudis, Rose 2104, August 

 8, 1897. 



