CARROT FAMILY 227 



oblong, 12-20 mm. long, tapering toward apex into a slender beak, caudate and densely hispid 

 at base. 



Woods, Transition and Boreal Zones; Alaska south to California and Arizona, eastward to Newfoundland 

 and New Hampshire; also southern Argentina and Chile. Type locality: "Concepcion," Chile. April-July. 



4. Osmorhiza obtusa (Coult. & Rose) Fernald. Blunt-fruited Sweet-cicely. 



Fig. 3490. 



JVashingtonia obtusa Coult. & Rose, Contr. U.S. Nat. Herb. 7: 64. 1900. 

 Osmorhiza obtusa Fernald, Rhodora 4: 154. 1902. 



Plants slender, 1.5-6.5 dm. high, the foliage hispid to glabrate. Leaves orbicular, 4-11 cm. 

 long, biternate or ternate-pinnate ; leaf-divisions broadly lanceolate to ovate, 1.5-5 cm. long, 

 coarsely serrate, incised or lobed ; bractlets wanting ; rays 2-5, widely divergent or some re- 

 flexed, 2-7 cm. long; pedicels 2-5, widely divergent, 1-3 cm. long; flowers greenish white; styles 

 minute; fruit clavate, 10-15 mm. long, obtuse or abruptly acute at apex, caudate and densely 

 hispid at base. 



Woods, Transition and Boreal Zones; eastern Washington to northeastern California, eastward to Labrador 

 and Vermont, Colorado and Arizona; also southern Argentina and Chile. Type locality: Ishawood Creek, north- 

 western Wyoming. May-June. 



5. Osmorhiza brachypoda Torr. California Sweet-cicely. Fig. 3491. 



Osmorhiza brachypoda Torr. ex Durand, Journ. Acad. Phila. II. 3: 89. 1855. 

 Osmorhiza brachypoda var. fraterna Jepson, Fl. Calif. 2: 670. 1936. 



Plants rather stout, 3-8 dm. long, short-pilose. Leaves ovate or deltoid, &-25 cm. long, ter- 

 nate-pinnate ; leaf-divisions ovate, 2-6 cm. long, coarsely serrate, incised and pinnately lobed 

 toward the base, pilose or strigose; bractlets several, linear or lanceolate, ciliate, spreading or 

 reflexed, exceeding the pedicels; rays 2-5, spreading-ascending, 2.5-10 cm. long; pedicels as- 

 cending, 1-3 mm. long; flowers greenish yellow; styles about 0.5 mm. long; fruit oblong-fusi- 

 form, 12-20 mm. long, tapering into a narrow beak at apex, caudate at base, short-hispid on the 

 conspicuous ribs. 



Woods, Transition Zone; central to southern California and Arizona. Type locality: "near the banks of 

 Deer Creek," Nevada City, California. March-May. 



11. AMMOSELINUM Torr. & Gray, Pacif. R. Rep. 2*: 165. 1855. 



Low branching annuals with ternately dissected leaves, the ultimate divisions linear 

 or spatulate. Flowers white, in sessile or peduncled compound umbels. Involucre absent 

 or present; involucels of a few linear or divided bractlets. Sepals obsolete. Fruit oblong- 

 ovoid to ovoid, flattened laterally; ribs prominent, tuberculate or spinulose-tuberculate; 

 oil-tubes solitary in the intervals or in our species 3; stylopodium conical, styles short. 

 [Name Greek, meaning sand-parsley.] 



A genus of 3 species of the southwestern United States and Mexico. Type species, Ammoselinum Popei 

 Torr. & Gray. 



1. Ammoselinum giganteum Coult. & Rose. Western Sand-parsley. Fig. 3492. 



Ammoselinum giganteum Coult. & Rose, Contr. U.S. Nat. Herb. 7: 89. 1900. 

 Ammoselinum occidentale Munz & Jtn. Bull. Torrey Club 52: 224. 1925. 



Stems solitary or several from the base, 10-20 cm. high. Leaves glabrous, 1.5-2.5 cm. long, 

 ternate-pinnately dissected, the divisions linear, 4-13 mm. long ; peduncles axdiary and teririmal ; 

 bractlets few, linear-lanceolate; rays several, unequal, 0-22 mm. long; pedicels unequal, 1-8 mm 

 long ; fruit oblong-ovoid, 3-5 mm. long, closely beset with callous teeth ; oil-tubes 3 in the intervals, J 

 on the commissure. 



Desert basins. Lower Spnoran Zone; southern California to Arizona and Coahuila. Type locality: mesas 

 near Phoenix, Arizona. April. 



12. DAUCUS L. Sp. Fl. 242. 1753. 



Pubescent caulescent annuals or biennials. Leaves pinnately decompound. Involucre 

 of f oliaceous, pinnately divided bracts ; involucels of many entire or divided bractlets In- 

 florescence compact in fruit. Flowers usually white. Sepals obsolete to evident. Fruit 

 ovoid to oblong, flattened dorsally. Carpels with slender bristly primary ribs and winged 

 secondary ribs bearing a single row of barbed or glochidiate prickles. Oil-tubes solitary 

 in the intervals, 2 on the commissural side. Seed flattened dorsally, the face somewhat 

 concave. [The ancient Greek name.] 



A genus of about 25 species of wide distribution, one native in the United States. Type species, Daucut 

 Carota L. 

 Bracts divided into short linear or lanceolate segments; central flower of the umbel white; plants^annuaL _^^ 



Bracts divided into elongate filiform segments; central flower of the umbel usually pink or P^'-Pjf :^Pl='c"„V%ia!""'^'' 



