34 MALVACES. 
1. LAVATERA, Linnzus. 
L. assurgentifiora, Kellogg. Showy flowers in axillary clusters. 
2. MALVA, Linn. 
M. rotundifolia and M. borealis are introduced weeds. 
3. SIDALCEA, Gray. 
* Perennials with usually clustered stems decumbent at base, 
Raceme loose: no stellate hairs: rose-purple petals an inch long...... sia wiece bats seicremies 
Raceme spicate: simple and stellate hairs: petals notched, pinkish, 6 lineslong........ 2 
Like No. 2, but the larger flowers deep lilac-purple............cecceceseecceseseees 3 
Stems branching: calyx globose in fruit: carpels smooth, straight.............2--+6+- 4 
Nearly glabrous, glaucous, pale, decumbent: petals obtuse or truncate............... & 
Stellate pubescence short: large leaves dark green, slightly 5-lobed...........-. sees 8 
** Annuals with erect branching stems. 
Carpels strongly incurved and sharply rugose on back..............eeeeececeecenees ti 
Carpels not incurved or rugose, conspicuously hairy-beaked................. Rininicusieiens 8 
Carpels several—nerved along the back: calyx-lobes abruptly acuminate. .... aisiaitsosbeciets g 
Pedicela subtended by 5-7-parted hispid bracts: calyx-lobes slender................. 1¢ 
Large, with cordate, 3-7-angled leaves: white flowers in close clusters:............... 11 
1, S. malveeflora, Gr. (S. humilis, Gr. of Cal. Bot., etc.) Common coast species. 
2. 8. spicata, Greene. Carpels small, hairy, not reticulaled. Sierra Nevada. 
3. S. campestris, Greene. Stems bristly with deflexed hairs: calyx stellate-hairy.. 
4. 8. Oregana, Gr. Glabrous below, 1 to 5 ft. high: corolla 6 lines long or more. 
5. S. glaucesens, Greene. Calyx lobes very slender. High Sierras, 
6. 8. asprella, Greene, Decumbent, leaves shaped alike. Foot Hills, Sierras, 
7. S. Hartwegi, Gr. Glabrous except the hispid calyx and pedicels. Sac. Val. 
8. 8S, hirsuta, Gr. Stout and tall, branching: flower-clusters dense. Chico, Cal. 
9. 8. calycosa, Jones. Corolla small, light purple: calyx long-ciliate. Cent. Cal. 
10. 8S. diploscypha, Gr. Hirsute: flowers large, umbellate clustered. Cent. Cal. 
Var. minor, Gr. Flowers racemose: petals with a spot at base. Cent. Cal. 
11. 8. malachroides, Gr. Petals obcordate: carpels smeoth. Redwoods, Cal. Coast. 
4. MALVASTRUM, Gray. 
Perennial, often shrubby: stems hoary or gray with soft pubescence...... eoeeee 1 to & 
Perennial: densely stellate-hairy or hispid: dense-flowered ............. aio arerers cease, Gi 
Annual erect with spreading hairs: leaves reniform, long petioled.................... 7 
Annual, decumbent: small leaves 5-lobed: flowers mostly solitary........ ieee eamhieeais 8 
4. M. Thurberi, Gr. Shrubby, branches slender: spikes naked: flowers small. 
