214 RANUNCULACEAE 



or two small leaves, 1.5-4 dm. long. Basal leaves semicircular or reniform, 2-4 mm. long by 3-5 

 mm. broad, 3-lobed, and again shallowly lobed ; sepals 5, white, petaloid, 7-10 mm. long by 4-6 

 mm. broad, glabrous ; petals 8-12, yellowish, almost lacking blades, the claws 2-3 mm. long, nec- 

 tary scale forked; achenes 25-30, 3 mm. long by 1 mm. broad, 3-striate on each face, beak 1.3 

 mm. long, hooked at the tip ; receptacle ovoid, very slightly elongated in fruit. 



Moist places near streams, often about waterfalls, notably so at Yosemite Valley, Transition Zone; Butte 

 County to Tulare County, California. Type locality: Forest Hill, Placer County. May-June. 



36. Ranunculus Andersonii A. Gray. Anderson's Buttercup. Fig. 1857. 



Ranunculus Andersonii A. Gray, Proc. Amer. Acad. 7: 327. 1867. 

 Beckwithia Austiniae Jepson, Erythea 6: 97. pi. 1. 1898. 

 Beckwithia Andersonii Jepson, Erythea 6: 99. 1898. 



Wholly glabrous perennial, caudex 3-5 mm. long, stout, scapes usually simple. Basal leaves 

 reniform, 2-3 mm. long by 2.5-4 mm. broad, pinnate, the 3 leaflets dissected into oblanceolate 

 segments' 7-8 mm. long by 2.5 mm. broad, thick; sepals 5, reddish, 7-8 mm. long by 5 mm. broad, 

 marcescent-persistent in fruit; petals 5, red, cuneate, 15-19 mm. long by 5 mm. broad, edges of 

 the nectary scale produced into ridges; fruits 15-25, utricular, appearing like sepals, 6-7 mm. 

 long by 4-5 mm. broad, beak less than 1 mm. long, deltoid-curving, seed 4-5 mm. long by 1 mm. 

 broad. 



Rocky desert hillsides, Arid Transition and Upper Sonoran Zones; Great Basin Ranges from Lake and 

 Malheur Counties, Oregon, to the Panamint Mountains, California, east to Idaho. Type locality: Blind Springs 

 Mountain, near Carson City, Nevada. April-May. 



37. Ranunculus Lobbii (Hiern) A. Gray. Lobb's Water Buttercup. Fig. 1858. 



Ranunculus hydrocharis var. Lobbii Hiern, Journ. Bot. Brit. & For. 9:66. pi. 114. 1871. 

 Ranunculus Lobbii A. Gray, Proc. Amer. Acad. 21: 364. 1886. 

 Batrachium Lobbii Howell, Fl. N.W. Amer. 1: 13. 1897. 



Glabrous aquatic annual, stems 1-10 dm. long. Lower leaves submerged, 1-4 cm. long, triter- 

 nately dissected into filiform divisions ; upper leaves floating, divided into 3 equal elliptical, diver- 

 gent lobes 5-8 mm. long by 2.5-5 mm. broad, the lateral lobes asymmetrically lobed at the apex; 

 sepals 5, 2 mm. long; petals 5, white, 4-6 mm. long by 1.5-2.5 mm. broad, nectary naked; 

 stamens 5-10; style filiform, 2-3 times as long as the ovary; achenes 4-6, obovate, 2.5 mm. long 

 by 1.5 mm. broad, turgid, faces with short, rough, transverse ridges, glabrous, style deciduous ; 

 receptacle not enlarged in fruit, glabrous. 



Shallow vernal pools, Transition Zone and border of the Upper Sonoran Zone; Vancouver Island, British 

 Columbia, western Oregon, and California from Sonoma, Lake, and Solano Counties to the Santa Cruz Moun- 

 tains and' Alameda County. Type locality: Oregon. March-May. 



38. Ranunculus aquatilis var. capillaceus (Thuill.) DC. Water 



Buttercup. Fig. 1859. 



Ranunculus trichophyllus Chaix in Vill. Hist. PI. Dauph. 1: 335. 1786. 

 Ranunculus capillaceus Thuill. Fl. Par. ed. 2. 1:278. 1799. 

 Ranunculus aquatilis var. capillaceus DC. Prod. 1: 26. 1824. 

 Ranunculus aquatilis var. brachypus Hook. & Am. Bot. Beechey 316. 1840. 

 Batrachium trichophyllum F. Schultz, Arch. Fl. France et All. 1: 107. 1848. 

 Ranunculus aquatilis var. trichophyllus A. Gray, Man. ed. 5. 40. 1867. 

 Batrachium Bakeri Greene, Leaflets Bot. Obs. 1 : 95. 1904. 

 Batrachium pedunculare Greene, Leaflets Bot. Obs. 1:95. 1904. 

 Ranunculus aquatilis var. Bakeri Jepson, Fl. Calif. 544. 1922. 

 Ranunculus aquatilis var. peduncularis Jepson, Fl. Calif. 544. 1922. 

 Ranunculus subrigidus W. Drew, Rhodora 38: 39. 1936. 



Glabrous or hispidulous aquatic perennials, the stems submersed, rooting at the lower nodes, 

 2-6 or rarely 20 dm. long. Leaf blades all submersed and finely dissected into filiform divisions, 

 usually collapsing when withdrawn from the water, 2-4 cm. long by 3-5 cm. broad; petioles 

 1-3 cm. long, stipular leaf bases 3-5 mm. long ; pedicels stout, 1-3 cm. long ; sepals light green, 

 spreading, ovate, 2-3 mm. long by 1-1.8 mm. broad, glabrous, half the length of the peta s ; 

 petals 5, white or the bases yellow, 4-8 mm. long by 1.5-2 mm. broad, the nectary scale gla- 

 brous, forming a shallow pocket ; stamens 5 or 10-25 ; achenes usually 10-20 in a globose cluster, 

 each achene obovoid, 1-1.5 or 2.5 mm. long by 1-1.5 mm. dorsoventrally by 0.5-0.7 mm. 

 laterally, roughly transversely ridged, glabrous from the beginning or the pistils hispid and 

 the achenes glabrate or with some hairs persisting on or near the dorsal sutures, the beaks about 

 0.3 mm. long; receptacle subglobose, 1 mm. long, densely pubescent. 



Ponds, vernal pools, and running or sluggish streams, Upper Sonoran and sometimes Transition Zones; 

 eastern Washington, eastern and western Oregon, and throughout California; widely distributed in North 

 America. Type locality: European. March-June. The specimens from east of the Sierra Nevada have usually 

 hairy achenes and so have some plants from middle California. 



Ranunculus aquatilis var. hispidulus E. Drew, Bull. Torrey Club 16: 150. 1889. (Ranuncidus Graya- 

 nus Freyn, Deutsch. Bot. Monatss. 8: 179. 1890. Ranunculus trichophyllus var hispidulus W. Drew, Kno- 

 dora 38: 29. 1936.) Upper portion of the stem floating; floating leaves 1-10, simple, reniform 0.5-1 cm. long 

 by 1-3 cm. broad, 3-lobed or -parted, the lobes again forked or parted, the ultimate lobes rounded, the leal proxi- 

 mally cordate and distally rounded, sometimes hispidulous dorsally; petals 4-6 mm long. Ponds and ditches 

 and vernal streams and pools at low elevations along the coast and up to 1,000 or 1,800 meters in the interior, 

 Transition Zones; Pacific Slope from the Shumigan Islands, Alaska, south to Monterey and Mariposa Counties 

 and at Cuyamaca Lake, San Diego County, California, east to Montana, Idaho, and Utah. Type locality. Jarni- 

 gan's, Humboldt County, California. 



