PIPER —FLORA OF THE STATE OF WASHINGTON. 2695 
(Nuphar polysepalum pictum Engelm.) are of frequent occurrence. Nymphaea advena has 
several times been reported from Washington, but it is improbable that that species occurs 
so far west, the above being mistaken for it. 
CERATOPHYLLACEAE. 
CERATOPHYLLUM. 
1. Ceratophyllum demersum L. Sp. PI. 2: 992. 1753. Hornworr. 
TyPE LocaLity: Europe. 
Rance: Temperate North America. Europe. 
SPECIMENS EXAMINED: Lake Washington, Piper, July 12, 1895. 
This plant is common in lakes, but is rarely collected. Fruiting specimens are very 
rare. Good material is a desideratum, as there is some probability that more than one 
species occurs in Washington. 
RANUNCULACEAE. Burrercur Famitry. 
Carpels with solitary ovules; fruit an akene. 
Sepals valvate in the bud; leaves opposite ............-- CLEMATIS (p. 266). 
Sepals imbricated in the bud; leaves not opposite. 
Cauline leaves three in a whorl. 
Styles short, glabrous or pubescent ...... 2... --- ANEMONE (p. 267). 
Styles long, plumose -.........-.------------- PULSATILLA (p. 268). 
Cauline leaves alternate or leaves all basal. 
Petals none; flowers small, numerous in corymbs or 
panicles. Leaves ternately decompound. .. .. - THALICTRUM (p. 263). 
Leaves simple, palmate. .....22.22.2.-2-.- TRAUTVETTERIA (p. 269). 
Petals present. 
Akenes numerous on an elongate receptacle ; 
flowers solitary on scapes; leaves entire... Myosurus (p. 269). 
Akenes in a globose or oblong cluster. 
Flowers white; akenes transversely wrin- 
kled 222.22 ..22-.-2--------------- Barracuium (p. 270). 
Flowers yellow; akenes not transversely 
wrinkled. ..-...-.-.--------------- RANUNCULUS (p. 270). 
Carpels with several ovules, in fruit follicles or berries. 
Flowers regular. 
Leaves simple, palmate. 
Petals none; leaves cordate-orbicular.......... - CALTHA (p. 277). 
Petals linear-spatulate; leaves palmately parted. . TRouuius (p. 277). 
Leaves compound. 
Sepals spurred .......---------------------- AQUILEGIA (p. 278). 
Sepals not spurred. 
Petals large ; sepals persistent ; flowers solitary. Pazon1a (p. 278). 
Petals small; sepals deciduous. 
Carpels becoming berries; flowers in 
Racemes.........-------------+-+-- Acraka (p. 278). 
Carpels becoming follicles. . 
Follicles stipitate; flowers solitary or 
umbellate ; leaves coriaceous, ever- 
green ........-.-.--.--.------- CoptTis (p. 278). 
Follicles sessile; flowers racemose; 
leaves membranous, deciduous... CimiciFuGA (p. 278). 
Flowers irregular. 
Upper sepal spurred; petals 4 .. 2.2.2 .222-2---.--- DELPHINIUM (p. 279), 
Upper sepal hood-like; petals 2...........2-....-.- ACONITUM (p. 282). 
