CARROT FAMILY 169 



11. BERULA Hoffm. Water Parsxip. l. B. erecla. 



12. CARUM L. Caraway. l. C. carui. 



13. LIGUSTICUM L. 



Stem leafy; divisions of the leaves not filiform. 



Ultimate divisions of the leaves 2-3 cm. wide; involucels none. 1. L. rerticillalum. 

 Ultimate divisions of the leaves less than 2 cm. wide, laciniate or pinnatifld. 

 Ultimate divisions of the leaves ovate to lanceolate. 



Lateral primary divisions less than half as long as the terminal one; leaves 

 therefore appearing pimiate; oil-tubes in the intervals 3, on the com- 

 missure 6-8. 3. L. simulans. 

 Lateral primary divisions at least two-tliirds as long as the terminal one; the 

 leaves therefore appearing ternate; oil-tubes in the intervals 4-6, on 

 commissure 6-10. 

 Secondary leaflets not cleft to near the midrib; fruit 4 mm. long. 



2. L. Canbyi. 

 Secondary leaflets cleft to near the midrib; fruit 5-6 mm. long. 

 Leaves thin and dark green. 



Fruit almost 5 mm. long; stylopodium conic. 4. L. Leibergii. 

 Fruit about 6 mm. long; stylopodium low and broad. 



Ultimate lobes of the leaves lanceolate, 5-10 mm. long. 



5. L. Portcri. 

 Ultimate lobes of the leaves ovate or oblong-ovate, usually less 

 than 5 mm. long. 6. L. brevilobum. 



Leaves tliicker, pale green. 7. L. affine. 



Ultimate divisions of the leaves or teeth linear or linear-lanceolate. 



8. L. filicinum. 

 Plant subscapose or with a single leaf; ultimate divisions of the leaves linear-flliform. 



9. L. lenuifolium. 



14. LIGUSTICELLA Coult. & Rose. i. L. Eastwoodae. 



14. BUPLEURUM L. 



Plant usually over 1 dm. liigh; bractlets lanceolate, acute, yeUowish green; fruit about 

 5 mm. long. 1- B. americanum. 



Plant usually less than 1 dm. liigh; bractlets obovate or elUptic, obtuse, dark green; 

 fruit 3 mm. long; flowers usually purplish. 2. B. purpureum. 



16. ZIZIA Koch. Alexanders, jMeadow Parsnip. 



Basal leaves, at least the earUer ones, simple, cordate. 1- Z. cor data. 



Basal leaves ternate. 2. Z. aurea. 



17. MUSINEON Raf. 



Divisions of the leaves obovate or oblong, toothed; rachis dilated. 

 Fruit glabrous or slightly puberulent. 



Plant evidently caulescent; basal leaf-sheath not scarious, slightly dilated. 



1. M. divaricatiim. 

 Plant with the stem abov^e ground very short; basal sheath strongly dilated and 

 scarious. 2. A/, pedunculatum. 



Fruit strongly scabrous-puberulent. 



Divisions of the leaves obtuse. 3. M. trachyspermum. 



Divisions of the leaves acute or acuminate. 4. M. angustifolium. 



Divisions of the leaves linear or linear-oblong, entire; rachis not dilated; leaf-sheath 

 strongly dilated. 5. M. vaginatum. 



18. DAUCOPHYLLUM (Nutt.) Rydb. 



Leaves bi- or tri-pinnate; segments fUiform; bractlets not exceeding the pedicels; seeds 

 subterete. 1. D. tenuifolium. 



Leaves pinnate: segments narrowly linear; bractlets longer than the pedicels; seeds 

 somewhat depressed. 2. D. linearv. 



19. ALETES Coult. & Rose. 



Peduncles longer than the leaves; branches of the umbels short. 



Leaflets romided-obovate in outline; their teeth ovate; fruit 5-6 mm. long. 



1. A. oborala. 



Leaflets rhombic-cimeate in outline, tncised-toothed, with lanceolate-acuminate teeth; 



fruit 4-5 mm. long. 2. A. acaulis. 



Peduncles shorter than the leaves; branches of the umbels nearly as long as the peduncles. 



3. A. humilis. 



20. OREOXIS Raf. 



Oil-tubes more than one in each interval; plant less than 1 dm. high, glabrous. 

 Bractlets linear, entire. 1. O. humilis. 



Bractlets obovate or oblanceolate, toothed. 2. O. Bakeri. 



Oil-tubes solitary in each interval. 



Plant less than 1 dm. liigh, more or less puberulent, at least the upper part of the 

 peduncle; leaflets cleft into 1-7 linear divisions, which are 4-5 mm. long; fruit 

 4-5 mm. long. 3. O. alpina. 



