208 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Oil tubes several in intervals. 
Petioles with white scarious margins. ......--- 38. L. sandhbergit. 
Petioles without white scarious margins. 
Fruit narrowly oblong; wings very narrow. . 39. L.microcarpum. 
Fruit broadly oblong; wings broadish .... 2... 40. L. donnellii. 
Flowers not yellow. | 
Pedicels very short (2 mm. long) ..22..2....2.--- 41. L. lemmoni. 
Pedicels elongated (6 mun. or more long). 
Involucels wanting. .......2222.-.-2.222...-.... 42. L. congdoni. 
Involucel bractlets present. .....2.2.-------.-- 43, LD. plummerae. 
Pubescent throughout. 
Ovary and usually the fruit: pubescent. 
Fruit glabrous .....2....-.--222---....-..-2.--- 44. 1. brevifolium. 
Fruit pubescent. 
Herbage softly pubescent. 
Wings of fruit marrow ....2....2..22...2--- 45. L. macdougali. 
Wings of fruit broad .......2....22..2-222-2---- 46. DL. jonesii. 
Herbage coarsely pubescent. 
Fruit wings broad ~....22222222.0222--2.-2-- 47. L. mohavense. 
Fruit wings marrow .......2----.----22------- 48. LL. argense, 
Ovary and fruit glabrous. 
Oil tubes several in all the intervals. 
Flowers white ........2...2..2.2.22-------------- 49, L. parishii. 
Flowers yellow ............-2--------------- 0. L. juniperinum. 
Oil tubes solitary in all or some of the intervals. 
Flowers purple ....2..0.0...2..2222-202-----00- 51. L. austinae. 
Flowers yellow ..0..222......2.2..2..----------- 52. 1. sonnes. 
Fruit linear....2.2. 22222202220. 222 222 eee eee eee 53. L. bicolor. 
PEDUNCLE STOUT, SOMETIMES MUCH SWOLLEN AT THE TOP. 
Fruit of medium size. 
More or less puberulent................-22.-.-----------2- D4. EL. anomalun. 
Glabrous throughout. 
Oil tubes several in the intervals......2.222.2222----. 55. DL. platyphyllin, 
Oil tubes solitary in the intervals....2....222222220222.-. 56. LL. nudicaule, 
Fruit very large. 
Ovary glabrous ......2..........----.-2222--------2 eee 57. 1. suksdorfii. 
Ovary pubescent .....22..2...----2022.22-2---22-2-----e ee 58. 1. giganteum. 
1. Lomatium gormani (Howell) C. & R. 
Peucedanum gormani Howell, Fl. N. W. Am. 1: 252. 1898 [April 1]. 
Peucedanum confusuin Piper, Erythea 6: 29. 1898 [April 10]. 
Acaulescent, glabrous or pubescent, 5 to 7.5 em. high from a shal- 
low globose tuber 2.5 em. or less in diameter and covered with fasci- 
cles of rootlets; leaves bipinnate, the ultimate segments oblong or linear; 
umbel unequally | to 5-rayed, with involucels of a few setaceous bract- 
lets or none; flowers white; fruit sessile or nearly so, rough puberulent, 
ovate, 6 mm. long, with wings more than half as broad as body, and 
evident dorsal and intermediate ribs; oil tubes 2 to 6 on the commis- 
sural side, 
Type locality, on ** high hills opposite The Dalles.” Oregon; collected 
by Howell, May, 1882; type in Herb, Coulter. 
