CARROT FAMILY 239 



1. Podistera nevadensis (A. Gray) S. Wats. Sierra Podistera. Fig. 3522. 



Cytnopterus nevadensis A. Gray, Proc. Amer. Acad. 6: 536. 1866. 

 Podistera nevadensis S. Wats. Proc. Amer. Acad. 22: 475. 1887. 

 Podistera atbensis Jepson, Madrono 1 : 140. 1923. 



Plants scabrous, the caudex with numerous very short branches. Leaves tufted, 3-10 mm. 

 long, the divisions 2i-7, lanceolate, acute; peduncles 0.5-3 cm. long; bractlets ovate, 3-5-cleft; um- 

 bels congested and composed of 3-5 subsessile umbellets ; fruit 1-2 mm. long. 



Rocky slopes, Hiidsonian Zone; summits of high mountain peaks, Sierra Nevada, White Mountains, and 

 San Bernardino Mountains, California. Type locality: Mount Dana, Sierra Nevada. Aug.-Sept. 



26. OREONANA Jepson, Madrono 1 ; 140. 1923. 



Low tufted stemless plants from a stout taproot, more or less pubescent or tomentose 

 throughout. Leaves pinnately or ternately decompound into small crowded divisions with 

 callous margins and cuspidate tips. Umbels compound, condensed and subcapitate ; in- 

 volucre none ; involucels one-sided. Flowers white or purplish ; sepals evident. Sterile 

 flowers on slender pedicels exceeding the rays ; fertile flowers sessile. Fruit ovoid, some- 

 what laterally compressed; ribs filiform; oil-tubes several in the intervals and on the 

 commissural side. [Name Greek, meaning mountain dwarf.] 



A genus of 2 species, natives of the California mountains. Type species, Oreonana californica Jepson. 



Rays membranously winged; sepals of sterile flowers conspicuous, the calyx star-shaped. 1. O. dementis. 

 Rays not winged; sepals of sterile flowers inconspicuous. 2. O. vestita. 



1. Oreonana Clementis (M. E. Jones) Jepson. Clemens' Mountain Parsley. 



Fig. 3523. 



Drudeophytittn Clementis M. E. Jones, Contr. West. Bot. No. 14: 33. 1912. 

 Oreonana californica Jepson, Madrono 1: 140. 1923. 

 Oreonana Clementis Jepson, Man. Fl. PI. Calif. 715. 1925. 



Low and tufted, peduncles and leaves from the root-crown, 3-8 cm. high. Leaves, pedicels 

 and carpels tomentose (rarely glabrate), the peduncles and petioles glabrous; umbels globose, 

 slightly exserted beyond the leaves ; rays 2-8 mm. long, membranously winged ; involucels with 

 5 ovate-lanceolate lobes ; fruit 3-4 mm. long, sessile ; sepals evident ; pedicels of sterile flowers 

 about equaling the fruit. 



Rocky ridges. Boreal Zones; southern Sierra Nevada, California. Type locality: Mount Whitney, California. 

 July-Aug. 



2. Oreonana vestita (S. Wats.) Jepson. Woolly Mountain Parsley, Fig. 3524. 



Deweya vestita S. Wats. Proc. Amer. Acad. 17: 374. 1882. 

 Orenonana vestita Jepson, Madroiio 1: 141. 1923. 



Plants 4-15 cm. high, densely white- woolly throughout. Peduncles equaling to longer than 

 the leaves; rays 10-20 mm. long; bractlets numerous, lanceolate-lobed ; sterile pedicels 10-15 

 mm. long; fruit subsessile, 5-6 mm. long, pubescent; oil-tubes 3-4 in the intervals, 3 on the 

 commissure. 



Exposed rocky situations, Canadian Zone; San Gabriel and San Bernardino Mountains, southern Cali- 

 fornia. Type locality: summit of Mount San Antonio (Old Baldy), San Gabriel Mountains. June-July. 



27. RHYSOPTERUS Coult. & Rose, Contr. U.S. Nat. Herb. 7: 185. 1900. 



Low prostrate glabrous herbs, the stems slender, mostly subterranean, arising from 

 a deep-seated woody taproot. Leaves ternate-subpinnate, coriaceous ; leaf -divisions lobed 

 or pinnatifid. Peduncles usually shorter than the leaves ; involucre none ; involucels usually 

 of conspicuous and scarious bractlets. Flowers white; sepals conspicuous; stylopodium 

 wanting. Fruit ovoid to globose, flattened laterally, glabrous; carpels flattened dorsally, 

 boat-shaped, with 7 equal prominent corky ribs appearing crenulate-winged when young ; 

 oil-tubes small, solitary in the intervals and in the apex of each rib, 2 on the commissure. 

 Seed-face concave. [Name Greek, meaning wrinkled wing.] 



A monotypic genus of western North America. 



1. Rhysopterus plurijvigus Coult. & Rose. Rhysopterus. Fig. 3525. 



Rhysopterus plurijugus Coult. & Rose, Contr. U.S. Nat. Herb. 7: 186. 1900. 



Leaves coriaceous, ovate-oblong, 10-40 mm. long, about equaling the petioles, the two lat- 

 eral leaflets ternately lobed or divided, the terminal ternately divided and the divisions again 

 ternately lobed or toothed, all the divisions about as broad as long ; rays several, stout, recurved 

 in age ; bractlets frequently scarious-margincd, about equaling the pedicels ; fruit ovoid to or- 

 bicular, often purplish, 3-4 mm. long, all the ribs similar, wing-like and wrinkled in the young 

 fruit. 



Dry sandy ground. Upper Sonoran Zone; Malheur and Harney Counties, eastern Oregon. Type locality: 

 Malheur Valley, nt-ar Harper Ranch, Oreaon. June-July. 



