CARROT FAMILY 273 



1. Conioselinum chinense (L.) B.S.P. Hemlock-parsley. Fig. 3615. 



Athamanta chinensis L. Sp. PI. 245. 1753. 



Selinum canadense Michx. Fl. Bor. Amer. 1: 165. 1803. 



Selinum pacificuni S. Wats. Proc. Amer. Acad. 11: 140. 1876. 



Selinum Bcnthamii S. Wats. Bibl. Ind. 432. 1878. 



Selinum Hookeri S. Wats. ex. Coult. & Rose, Rev. N. Amer. Umbell. 45. 1888v 



Conioselinum chinense B.S.P. Prelim. Cat. N.Y. 22. 1888. 



Conioselinum Gmelinii Coult. & Rose, Contr. U.S. Nat. Herb. 7:150. 1900. Not Steud. 1840. 



Stout, branching, 3-15 dra high. Leaves ovate to deltoid, 1-2-pinnate or ternate-pinnate ; 

 leaf-divisions lanceolate to ovate, 1-4.5 cm. long, pinnatifid, the lobes acute, entire or toothed; 

 cauline leaves with dilated sheatlis ; bracts foliaceous or replaced by leaves, or involucre none ; 

 bractlets few to numerous, scarious-marigned, linear; rays 13-30, 1.5-4.5 cm. long; pedicels 

 5-8 mm. long; fruit oblong-oval to oval, 4-6 mm. long; dorsal ribs acute, the laterals broadly 

 winged. 



Cold marshes, Transition and Boreal Zones; Pacific Coast from Alaska to California, also on the Atlantic 

 Coast and Siberia. Type locality: "Genesee County," western New York (Missread as "Chinese, gives the 

 plant its specific name!). July-Sept. 



Z9. SPHENOSCIADIUM a. Gray, Proc. Amer. Acad. 6: 536. 1865. 



Thick-rooted perennials, with stout nearly simple stems, glabrous up to the tomentose 

 inflorescence. Leaves 1-2 pinnately, or ternate-pinnately compound, with bladdery, dilated 

 petioles. Involucre none; involucels of numerous deciduous linear-setaceous bractlets. 

 Umbels compound, rather long-rayed; umbellets capitate, with crowded sessile flowers. 

 Sepals obsolete. Flowers scarious, white or purplish. Fruit strongly flattened dorsally, 

 cuneate-obovate ; carpels ribbed at base, winged above. Stylopodium small, conical; 

 oil-tubes solitary in the intervals, 2 on the commissure. Seed-face plane. [From the two 

 Greek w^ords meaning wedge and umbrella, referring to the umbel] 



A single species, native of western North America. 



1. Sphenosciadium capitellatum A. Gray. Sphenosciadium or Swamp 



White-heads. Fig. 3616. 



sphenosciadium capitellatum A. Gray, Proc. Amer. Acad. 6: 537. 1866. 



Selinum eryngiifolium Greene, Pittonia 2: 102. 1890. 



Selinum validum Congdon, Erythea 7 : 185. 1900. 



Sphenosciadium capitellatum var. scabrum Jepson, Man. Fl. PI. Calif. 729. 1925. 



Stems stout, 5-18 dm. high. Leaves large, often 1-4 dm. long, scabrous to glabrate; leaf- 

 divisions linear-oblong to ovate-lanceolate, 1-12 cm. long, remotely serrate to coarsely dentate, 

 incised or pinnatifid; rays 4-18, about equal, 1.5-10 cm. long, densely tomentose; umbellets 

 globose; flowers sessile, pubescent; fruit cuneate-obovate, 5-8 nrnK long. 



Moist places. Arid Transition and Canadian Zones; eastern Oregon to southern California, east to Idaho 

 and western Nevada. Type locality: near Ebbett Pass, Sierra Nevada, California. July-Aug. 



40. GLEHNIA F. Schmidt ex Miq. Ann. Mus. Bot. Lugd.-Batav. 3 : 61. 1867. 



Low somewhat fleshy maritime herbs, from a stout taproot. Leaves petiolate, 1-2- 

 ternate or ternate-pinnate, broadly ovate. Peduncles stout, villous, mostly shorter than 

 the leaves. Involucre with a few linear bracts or wanting ; involucel with several linear- 

 lanceolate bractlets. Flowers white; calyx-teeth minute; stylopodium none. Fruit 

 ovoid-oblong to orbicular, flattened dorsally; lateral and dorsal wings present and con- 

 spicuous, thickened at the base; oil-tubes large, numerous. [Meaning of name not 

 explained in original publication; possibly in honor of P. von Glehn, curator, Botanic 

 Garden, St. Petersburg.] 



A genus of 2 species inhabiting the Pacific shores of western North America and eastern Asia. Type 

 species, Glehnia littoralis Schmidt. 



1. Glehnialeiocarpa Mathias. American Glehnia. Fig. 3617. 



Glehnia littoralis of American authors, not of Schmidt, 1867. 



Glehnia leiocarpa Mathias, Ann. Mo. Bot. Card. 15: 95. pi. 17. figs. 1, 4; pi. 19. fig. 2. 1928. 



Low nearly stemless perennial, the sheathing petioles usually buried in the sand. Leaves 

 widely spreading, usually prostrate, broadly ovate, 2.5-15 cm long, the petioles stout, 2.5-15 

 cm. long, tomentose, the blades ternate ; leaf-divisions ovate, often 3-lobed or 3-divided, irregu- 

 larly serrate with callous teeth, thick, green and glabrous or glabrate above, densely white- 

 tomentose beneath; peduncles stout; rays 5-13, stout, 0.5-4.5 cm. long, woolly; fruit 4-12 mm. 

 long, glabrous or sparsely hairy at apex, the wings conspicuous, corky. 



Drifting sands along the seashore. Humid Transition and Boreal Zones; Yakutat Bay. Alaska to Mendocino 

 County, California. Type locality: Shoalwater Bay, Washington. May-July. 



41. PTERYXIA Nutt. ex Coult. & Rose, Contr. U.S. Nat. Herb. 7: 170. 1900. 

 Low cespitose perennials, with a deep-seated root, the stems clothed at base with the 



persistent petiolar sheaths. Leaves 1-2-pinnately or ternate-pinnately decompound into 



