G30 . UMBELLIFER7E. Tiedmannia. 



Fruit oblong-elli]itical, flat, with a thickish corky winged margin: ribs very 

 slender, filiform ; the lateral ones united with the winged margin. Inten^als 

 broad, without true vitta3, but marked with 6-8 vittee-like lines. Commis- 

 sure without vittaa. Seed flat. Carpophore 2-parted. — Perennial (North 

 West American) glabrous herbs (1-3 feet high), with tuberous roots, and bi- 

 ternately much divided leaves. Involucre none. Involucels unilateral, 

 many-parted, with narrow segments. Flowers brown or yellow. 



-- 1. L. dissecta (Nutt. ! mss.) : *' umbels radical and terminal; flowers 

 dark brown ; segments of the leaves ovate, incisely pinnatifid ; the lobes 

 lanceolate, entire or 2-3-toothed ; fruit many times longer than the pedicels. 

 "Plains of the Oregon near the confluence of the Wahlamet. — Root large. 

 Stem about 3 feet high, glaucous, terete. Secondary divisions of the leaves 

 bipinnatifid; Peduncle very long. Involucels shorter than the many-flow- 

 ered umbellets; the segments subulate. Rays of the umbel 12-24, slender, 

 2-4 inches in length. Fruit three-fourths of an inch long, nearly tasteless, 

 owing to the absence of vitt36." Nuttall. 



2. L. muUifida (Nutt. mss.) : " stem low ; umbel terminal ; flowers yel- 

 low ; segments of the leaves pinnately parted ; the lobes linear ; fruit a little 

 shorter than the pedicels. 



" Plains of the Oregon, east of Wallawallah, and in the Blue Mountains. 

 — Root a roundish white tuber, almost like a turnip. Plant 1-2 feet high, 

 somewhat spreading. • Fruit very similar to that of the preceding species." 

 Nuttall. 



3. L.? Californica (Nutt. mss.): "nearly stemless: leaves biternately 

 divided ; segments pinnatifid, obtuse, acutely and incisely serrate, the termi- 

 nal one 3-lobed ; petals (yellow) lanceolate, with a long inflexed point. 



" St. Barbara, Upper California.^ — Leaves on long petioles, ^yith very few 

 rather small divisions. Rays of the umbel 10-12. Calyx minutely 5-tooth- 

 ed. Fruit not seen. — ^Perhaps' a species of Polytfenia ; the leaves being 

 similar, but thinner. It differs from the two preceding species in the sum- . 

 mit of the petals being long and subulate, instead of short and broad.'* 

 ■ Nuttall. 



30. TIEDMANNIA. DC. mem. Umh. p. 51, t. 12, &; prodr. 4. f. 187. 



Margin of the calyx 5-toothed. Petals broadly ovate, with a narrow in- 

 flexed point. Fruit much compressed dorsally, obovate. Carpels with 5. 

 filiform somewhat carinate approximated equal ribs ; the lateral ones dilated 

 into a membranaceous margin nearly as broad as the dorsal disk. Intervals 

 with single large vittte. Commissure with 2 vittEe. Carpophore 2-parted. 

 Seed flat. — A glabrous biennial ? herb, with a fistulous stem ; and leaves 

 reduced to terete nodose petioles. Involucre and involucels of 5-6 subulate 

 leaves. • Flowers white. 



The insertion of the anthers in this plant does not differ from that of other 

 UmbeilifersB. 



' T. teretifolia (DC. ! 1. c.)— (Enanthe filifbrmis, Walt. Car. p. 113, not of 

 Lam. CE. Caroliuensis, Pers. syn, l.p.SlS; Pursh, fl. 1. j;. 194. CE. 

 teretifolia, Muhl. ! cat. ed. 2. p. 31. Slum teretifolium, Ell. sic. 1. p. 354. 

 Ponds and swamps, Harper's Ferry, Virginia, {Dr. Aikin !) to Florida I 



