486 MAX-VACEAE 



filaments more or less united into sets. Fruit consistinji: of 5 to 9 carpels, the ear- 

 pels 1-seeded, commonly beaked. — Species 20, western North America. (Sida, a 

 genus of this family, and Alkea, ancient name for a mallow, alludinp: to the appear- 

 ance and relationship of these plants.) 



A. Leaf-blades orbicular in outline, at least some (usually the upper) pedately parted or divided; 

 flowers usually rose-pinJc or purple. — Subgenus Eusidalcea. 



Annuals (except no. 5) ; spring flowering; stamineal column conspicuously divided into an outer 

 and an inner series. 

 Carpels rugose-reticulate or somewhat favose on the back. 



Bracts conspicuous, f oliaceous, palmately divided into filiform segments ; plants hairy.. 



1. S. diploscypha. 

 Bracts inconspicuous, narrowly linear or oblong and entire. 



Herbage nearly glabrous to sparsely stellate-puberulent ; carpels renif orm, incurved 



at maturity; flowers sparse in short racemes; slender plants 



2. S. hartwegii. 

 Herbage more or less densely hirsute ; carpels orbicular, not incurved at maturity ; 



spikes densely flowered ; stout plants 3. S. hirsuta. 



Carpels longitudinally grooved or striately nerved on the back. 



Annual ; stipules and bracts broadly to narrowly ovate, acuminate, 1 to 3 lines long 



4. S. calycosa. 

 Perennial ; stipules and bracts broadly ovate, mostly obtuse, papery and purple-tinged, 



4 to 8 lines long 5. S. rhizomata. 



Perennials ; mostly summer flowering ; stamineal column with the outer series closely approximat- 

 ing the inner series. 

 Stems decumbent, arising from slender rootstoeks and rooting at the nodes; mainly Sierra 

 Nevada and Humboldt Co. 



Leaves mainly basal and very long-petioled 6. S. reptans. 



Leaves only a few basal, the stems leafy throughout; petioles mostly short..?. S. asprella. 

 Stems erect or sometimes decumbent, arising from a thick root-crown, not rooting at the 

 nodes. 

 Herbage glaucous, often glabrous or subglabrous. 



Blades of lowest leaves for most part crenately toothed or lobed, usually different 



from the upper; Southern California 8. S. neomexicana. 



Blades of lowest leaves deeply lobed or divided into narrow segments, similar to 



the upper; Sierra Nevada 9. S. glaucescens. 



Herbage not glaucous, usually hirsute or stellate-pubescent, rarely glabrous. 



Stems subscapose; San Bernardino Mts 10. S. pedata. 



Stems more or less leafy. 



Flowers in spikes or heads. 



Spikes broad (11 to 16 lines wide), very dense; plants coarse; Humboldt 



coast 11. S. eximia. 



Spikes narrow (f to 9 or 12 lines wide), sometimes dense, often lax, some- 

 times interrupted; plants slender; montane, inner ranges 



12. S. oregana. 

 Flowers usually in racemes; mainly coastal 13. S. malvaeflora. 



B. Leaf-blades suborbicular in outline, none parted or divided; carpels smooth 

 (or nearly so) ; perennials. — Subgenus Hesperalcea. 



Flowers white, in oblong spikes; plants stout; leaves like those of a grape 14. S. malachroides. 



Flowers rose-purple, in elongate spicate racemes; plants more slender; leaf -blades suborbicular, 

 serrate or shallowly incised 15. S. hickmanii. 



1. S. diploscypha Gray . Cup Sidalcea. (Fig. 239.) Stem erect and simple, 

 or more robust and freely branching, l^^ to 2 feet high; herbage pilose-hispid and 

 also with a minute stellate pubescence; blades of basal leaves more or less deeply 

 crenate, I/2 to 1^ inches wide, the cauline parted and 2 or 3-cleft, the bracteal 

 filiform-divided; petioles % to 2i/4 inches, or the lower to 5^ inches long; flowers 

 on short pedicels in umbellate clusters at the ends of the branches; bracts 4 to 8 

 lines long; calyx-lobes lanceolate-subulate; petals dark pink, with or without a 

 dark purple center, minutely erose-denticulate, % to 1^ inches long; filaments of 

 the outer series united nearly to the summit into sets of 5 to 10; carpels nearly 

 orbicular, dorsally reticulated but only lightly. 



