1922] 



PAYSON — STUDY OF THELYPODIUM AND ITS IMMEDIATE ALLIES 267 



plants must be considered conspecific, at least until further col- 

 lections confirm their segregation. 



6. T. vernale Wooton & Standley, Contr. U. S. Nat. Herb. 16 : 

 12S. 1913, and 19: 268. 1915. 



Biennial, glabrous: stems slender, branched throughout, glau- 

 cous, purplish near the base, about 4 dm. high, the branches 

 strongly ascending: cauline leaves triangular-lanceolate, atten- 

 uate, 3.5-5 cm. long, slightly glaucous, entire, somewhat undu- 

 late, auriculate-clasping at the base, the lobes obtuse, 5-7 mm. 

 long: sepals narrowly oblong, obtuse, 2.5 mm. long, green or 

 tinged with purple; petals white, slightly tinged with purple, 

 narrowly oblong, tapering gradually toward the base, the whole 

 5 mm. long or less: racemes elongated; pedicels ascending, slen- 

 der, about 5 mm. long: pods slender, 4-6 cm. long, somewhat 

 divergent, arcuate; septum without a midrib; style truncate, 



stigma not bilobate. 



Distribution: western New Mexico. Type: Wooton 8847 from 



"low mountains west of San Antonio, Socorro County." 



No specimens have been seen that could be referred to this 

 species and its identity remains in doubt. From a geographical 

 viewpoint it might be supposed to be most closely related to 

 T. ovalifolium but the very long pods seem to distinguish it from 

 that sDecies. 



7. T. sagittatum (Nutt.) Endl. in Walp. Rep. 1: 172. 1842; 

 Wats. Bot. King's Exp. 25. 1871 ; Brewer & Wats. Geol. Survey 



Calif. Bot. 1 : 37. 1876 ; Coulter, Manual Rocky Mountain Re- 

 gion, 21. 1885; Robinson in Gray, Syn. Fl. N. Am. I 1 : 175. 

 1895 ; Clements & Clements, Rocky Mountain Flowers, 28. 1914 ; 

 Rydb. Fl. Rocky Mountains, 367. 1917. 



Streptanthus sagittatus Nutt. Jour. Acad. Phila. 7: 12. 1834; 

 Torr. & Gray, Fl. N. Am. 1 : 76. 1838 ; Hook. & Arn. Bot. Beech- 

 ey's Voy. 322. 1841 ; Walp. Rep. 1 : 128. 1842 ; Dietr. Syn. PI. 3 : 

 729. 1843; Gray, Proc. Am. Acad. 6: 187. 1866. 



Pachy podium sagittatum Nutt. in Torr. & Gray, Fl. N. Am. 1 : 

 97. 1838; Dietr. Syn. PI. 3: 702. 1843. 



Thelypodium Nuttallii Wats. Bot. King's Exp. 26. 1871; 

 Coulter, Manual Rocky Mountain Region, 21. 1885; Robinson in 

 Gray, Syn. Fl. N. Am. I 1 : 176. 1895; Howell, Fl. Northwest Am. 

 58. 1897; Rydb. Fl. Rocky Mountains, 367. 1917. 



IT. amplifolium Greene, Erythea 4: 173. 1896. 



