[Vol. 9 



262 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



tPods 1-3 cm. loner 5. T. ovalifolium 



ttPods 4-6 cm. long 6. T.vernale 



00. Inflorescence; corymbose or short- 

 ly racemose. 



x. Pods 1-1.5 mm. wide 7. T. sagittatum 



y. Pods about 2 mm, wide 7a. T. sagittatum 



var. crasHcarpufn 

 2. Petals filiform; inflorescence race- 

 mose from before anthesis 8. T. stcnopctalum 



II. Perennial; caudez clothed with the papery 



leaf -bases of previous years' growth 9. T.flexuosum 



B. Cauline leaves not sagittate or amplexicaul at the base. 



a. Leaves toothed or lobed. 



I. Pedicels horizontal; pods widely spreading. 



■Sepals white 10. T '. laciniatum 



**Sepals purple, at least in part 10a. T. laciniatum 



var. streptanthoides 



II. Pedicels curved upwards; pods erect or nearly 



so 10b. T. laciniatum 



b. Leaves entire. 



var. millcflorttm 



I. Pedicels 3-5 mm. long, flattened at the base, 

 petals white. 



*Stipe 1-2 mm. long It. T . rhomboid cum 



**Stipe 2-3 mm. long 11a. T. rhomboid cum 



var. gracilipes 



II. Pedicels 5-10 mm. long; petals white or pur- 

 ple. 



*Stipe 1-2 mm. long; nectar glands horn- 

 like processes. 



1. Nectar glands 4; pods terete 12. T. intcgrifolium 



2. Nectar glands 2 (lateral pairs coher- 



ent) ; pods somewhat compressed 13. T.affine 



Stipe usually less than 1 mm. long; nectar 

 glands inconspicuous, low. 



1. Mature inflorescence elongated 14. T.Ulacinum 



2. Mature inflorescence subumbellate 14a. T. lilacinum 



var. subumbellatum 



* K 



1. T. eucosum Robinson in Gray, Syn. Fl. N. Am. I 1 : 175. 

 1895 ; Howell, Fl. Northwest Am. 58. 1897 ; Frye & Rigg, North- 

 west Fl. 179. 1912; Rydb. Fl. Rocky Mountains, 367. 1917. 



T. Nuttallii Brewer & Wats. Geol. Survey Calif. Bot. 1: 37. 



187<J, in part. 



Probably biennial, glabrous throughout, more or less glaucous: 

 radical leaves oblanceolate, narrowed to a petiole, subentire; 

 cauline leaves oblong to lanceolate, entire, 2-6 cm. long, usually 

 acute, amplexicaul at the base: sepals reddish purple, narrow, 

 6-7 mm. long, not saccate; petals narrowly spatulate, S-ll mm. 

 long, red-purple; filaments linear, 6-7 mm. long, purplish, anthers 

 about 3 mm. long, apiculate: inflorescence racemose; pedicels 

 horizontal or slightly descending, enlarged at the apex, 3-5 mm. 

 long: pods arcuate, ascending, terete, slightly torulose, 3-4.5 cm. 

 long (not mature) ; stipe about 2 mm. long; style less than 1 mm. 

 long; stigma entire, small. 



