98 MALVACEAE 



1 -ovulate; ovule ascending. [Name compounded from the two generic names, Sida and 

 Alcea, because of resemblances to each.] 



A genus of about 35 species in western North America, chiefly in California and Oregon. Type species, 

 Sida malvaeflora DC. 



Annuals; plants flowering in early spring. 



Outer stamineal phalanges dilated, undivided, shorter than the inner. 



Carpels dorsally favose-reticulate, the meshes nearly as broad as long; herbage more or less hispid. 



Bracts palmately 3-7-divided, conspicuous, equaling or exceeding the calyx-lobes. 



1. o. atploscypna. 



Bracts simple, not palmately divided, shorter than the calyx. 



Divisions of cauline leaves linear-lanceolate, entire; inflorescence many-flowered; lower part 



of stems glabrate. 2. S. hirsuta. 



Divisions of cauline leaves oblanceolate, irregularly 2-S-toothed; inflorescence few-flowered; 



stems hirsute throughout. 3. 5. Keckit. 



Carpels dorsally striate-reticulate, the meshes several times as long as broad; herbage glabrate or 



sparsely hirsutulous above. 4. S. calycosa. 



Outer stamineal phalanges divided into narrow divisions, not dilated, equaling the inner phalanges. ^ 

 «- o 5. o. n artwegil. 



Perennials; plants flowering in late spring and summer. 



Herbage and stems somewhat succulent; stamineal column conspicuously biseriate. 6. S. rhizomata. 

 Herbage not succulent; outer phalanges of stamineal column closely approximating the inner series. 

 Leaves thick, not vitiform; stamens numerous; plants herbaceous. 



Inflorescence distinctly spiciform, the buds and flowers crowded, rachis elongating in fruit. 

 Leaves all alike, pedately parted; stems scapose. 7. S. pedata. 



Leaves not alike, lower lobed only, not pedately parted; stems more or less leafy. 



Spike dense; pedicels 0.5-4 mm. long at anthesis; lower part of stems hirsute or glabrate, 

 not stellate. 

 Carpels 1.8-2 mm. high, about as broad, strongly reticulate, much depressed; stems 



procumbent; rootstocks creeping. 8. S . ranunculacea. 



Carpels 2.5-3 mm. high, two-thirds as broad, smooth or nearly so; stems erect: 

 rootstocks not creeping. 

 Lower leaves 3-6 cm. broad; stipules 3-6 mm. long; spikes narrow. 



9. S. spicata. 



Lower leaves 10-20 cm. broad; stipules 8-15 mm. long; spikes broad. 



10. 5". exitnia. 



Spike lax; pedicels S-7 mm. long; stems sparsely stellate-pubescent, not hirsute; carpels 

 distinctly reticulate. H- S. oregana. 



Inflorescence laxly racemose, not crowded. 



Leaves distinctly lobed or parted; stamineal column biseriate. 



Carpels smooth; stems glabrous or nearly so. 12. S. Hendersonii. 



Carpels distinctly reticulate, at least on the angles; stems usually pubescent. 



Stems decumbent, rooting at the nodes; rootstocks creeping; leaves mostly basal. 



13. A. reptans. 

 Stems erect; rootstocks not creeping; stems leafy. 



Basal and cauline leaves dissimilar, the upper divided, the lower merely lobed; 

 carpels distinctly reticulate laterally. 

 Pubescence of harsh stellate hairs; notches between lobes of lower leaves 

 broad, equaling lobes. 

 Herbage green; pubescence coarse; stems rarely glabrate; petals 15-30 



mm. long; beak stout. 14. S. asprella. 



Herbage glaucous; pubescence minute; stems usually glabrate; petals 

 10-18 mm. long; beak weak. 15. S. glaucescens. 



Pubescence soft; notches between lobes of lower leaves narrower than the 

 lobes. 

 Stems and herbage green, not glaucous; stems decimibent; rachis of 

 inflorescence densely pubescent. 

 Calyx-lobes 7-10 mm. long; carpels strongly reticulate dorsally. 



16. S. malvaeflora. 



Calyx-lobes 4-6 mm. long; carpels smooth dorsally. 



17. 5. virgata. 



Stems and herbage glaucous; stems erect; rachis of inflorescence gla- 

 brous or nearly so. 18. 5. neo-mexicana. 

 Basal and cauline leaves similar, all parted to base of blade; carpels faintly 

 reticulate laterally, smooth dorsally. 

 Leaves 1-5 cm. broad, glaucous; stems cespitose; petals deep rose-purple, 



retuse. 19. 5'. multifida. 



Leaves 5-20 cm. broad, green; stems not cespitose; petals pink to white, 

 emarginate. 20. S. campestris. 



Leaves crenate, scarcely lobed, flabelliform; stamineal column not distinctly biseriate, the 

 stamens clustered at the apex. 21. S. Hickmanu. 



Leaves thin, vitiform; stamens few; flowers small, white; plants suflfruticose. 22. S. malachroides. 



1. Sidalcea diploscypha (Torr. & Gray) A. Gray. Fringed Sidalcea. Fig. 3196. 



Sida diploscypha Torr. & Gray, Fl. N. Amer. 1: 234. 1838. 



Sidalcea diploscypha A. Gray ex Benth. PI. Hartw. 300. 1848. 



Sidalcea diploscypha var. minor A. Gray, Mem. Amer. Acad. II. 4: 19. 1849. 



Sidalcea secundiflora Greene. Fl. Fran. 103. 1891. 



Erect annual 1-7 dm. high, pilose-hirsute throughout, short-stellate hairs intermixed with 

 the simple. Basal leaves orbicular-cordate, crenate, 1-2.5 cm. broad; cauhne leaves 2-6 cm. 

 wide deeply 5-7-parted, the divisions oblong, 2-3-lobed ; stipules simple, hnear, or 2-5-parted 

 into filiform segments, 5-22 mm. long; inflorescence laxly racemose to cymose, few-flowered; 



