34 MALVACEAE. 



1. !LAVATERA, Linnaeus. 

 L. assurgentiflora, Kellogg. Showy flowers in axillary clusters. 



2. MALVA, Linn. 

 M. rotnndifolia 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 1 



Raceme spicate: simple and stellate hairs: petals notched, pinkish, 6 lines long 2 



Like No. 2, but the larger flowers deep lilac-purple 3 



Stems branching: calyx globose in fruit: carpels smooth, straight 4 



Nearly glabrous, glaucous, pale, decumbent: petals obtuse or truncate 5 



Stellate pubescence short: large leaves dark green, slightly 5-lobed 6 



* * Annuals with erect branching stems. 



Carpels strongly incurved and sharply rugose on back 7 



Carpels not incurved or rugose, conspicuously hairy-beaked 8 



Carpels several nerved along the back: calyx-lobes abruptly acuminate 9 



Pedicels subtended by 5-7-parted hispid bracts: calyx-lobes slender 10 



Large, with cordate, 3-7-angled leaves: white flowers in close clusters: 11 



1. S. malvseflora, Gr. (S. humilis, Gr. of Cal. Bot., etc.) Common coast species. 



2. S. spicata, Greene. Carpels small, hairy, not reticulaled. Sierra Nevada. 



3. S. campestris, Greene. Stems bristly with deflexed hairs: calyx stellate-hairy. 



4. S. 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. S. hirsuta, Gr. Stout and tall, branching: flower-clusters dense. Chico, Cal. 



9. S. calycosa, Jones. Corolla small, light purple: calyx long-ciliate. Cent. CaL 



10. S. diploscypha, Gr. Hirsute: flowers large, umbellate clustered. Cent. Cal. 

 Var. minor, Gr. Flowers racemose: petals with a spot at base. Cent. Cal. 



11. S. xnalachroides, Gr. Petals obcordate: carpels smooth. Redwoods, Cal. Coast, 



4. MALVASTRUM, Gray. 

 Perennial, often shrubby: stems hoary or gray with soft pubescence ............ 1 to 5 



Perennial: densely stellate-hairy or hispid: dense-flowered 6 



Annual erect with spreading hairs: leaves reniform, long petioled 7 



Annual, decumbent: small leaves 5-lobed: flowers mostly solitary. 8 



1. 9C. Thurberi, Gr. Shrubby, branches slender: spikes naked: flowers small. 



