238 MALVACEAE. 



obtuse, rounded at base, finely serrate, glabrate above, paler and puberulent 

 beneath, 5-8 cm. long; petioles slender; panicles lateral, 6-10 cm. long, their 

 peduncles villous; flowers white; capsules smooth, 3-lobed. 

 In open woods, not common in our limits. 



Ceanothus thyrsiflorus Esch. California Lilac. Loosely branched 

 shrub, 15 m. high; twigs angled, brownish, glabrous or nearly so; leaves 

 elliptic, acute at base, obtuse at apex, finely dentate, 3-nerved, glabrous 

 except on the veins beneath, 2-5 cm. long, on short hairy petioles; flowers 

 usually blue, in dense compound terminal panicles; capsule globose, smooth. 



Western Oregon and California, on rocky slopes. Very showy when 

 in bloom. 



Family 62. MALVACEAE. MALLOW FAMILY. 



Herbs or shrubs; leaves alternate, pal mately- veined, with 

 stipules; flowers regular, showy; peduncles axillary, jointed; 

 calyx valvate; sepals 5, united at base, often subtended by an 

 involucre of numerous bractlets; corolla convolute; petals 5, 

 their bases united with each other and with the stamen-column; 

 stamens numerous, monadelphous, in a column; pistils several, 

 the ovaries united in a ring or forming a several-celled pod; 

 endosperm scanty. 



Bractlets none; stamens in two series. 316. SIDALCEA, 238. 



Bractlets 3; stamens monadelphous. 317. MALVA, 239. 



316. SIDALCEA. 



Herbs (ours all perennials) ; leaves rounded, mostly lobed or 

 parted; flowers pink or red, in a narrow terminal raceme or spike; 

 involucre none; stamen-column double, the filaments of the outer 

 series united usually into 5 sets opposite the petals; styles filiform, 

 stigmatic on the inner surface; carpels 5-9, 1-ovuled, separating 

 at maturity from the short axis, indehiscent. 



Flowers red; mature carpels smooth. 5. hendersonii. 

 Flowers pink; mature carpels rugose. 



Stems hirsute. 5. campestris. 



Stems stellate-pubescent. S. virgata. 



Sidalcea hendersonii Wats. Perennial, glabrous or nearly so and bright 

 green; stems erect, 60-90 cm. high, nearly simple; leaves orbicular, deeply 

 5-7-cleft, the segments merely lobed or toothed; flowers deep rose-colored, in 

 terminal racemes; bracts linear, exceeding the pedicels; calyx-lobes ovate, 

 acuminate, 12-15 mm. long; petals 2.5 cm. long; carpels glabrous, not rugose. 



In marshes near the sea shore, Vancouver Island, British Columbia, to 

 Oregon. Abundant near Everett, Washington. 



Sidalcea campestris Greene. Perennial, pale green, pubescent with both 

 simple and stellate hairs; stems 30-90 cm. high, often branched above, bristly- 

 hirsute; leaves orbicular, the leaves 5-9-lobed or cleft, the upper deeply 5-9- 

 parted, the segments divided into narrow lobes; petioles longer than the blades; 

 racemes erect, rather dense; calyx usually canescent, 8-10 mm. long; petals 



