MALVACE^:. 



27 



MALVACEAE. 



Herbs or shrubs with alternate stipulate leaves; dis- 

 tinguished by the valvate calyx, convolute petals, their 

 bases or short claws united with the base of a column 

 of many united stamens, these with reniform anthers. 

 Calyx 5-cleft or parted, persistent, with sometimes a 

 calyx-like involucel of bracts. Petals 4, usually with- 

 ering without falling off. Pistil usually either a ring 

 of ovaries around a projecting receptacle or a 3-10 

 celled ovary: styles united at least at the base. Leaves 

 usually palmately ribbed. Flowers axillary. 



Cotton is the most notable plant in this order. Key 

 to genera and species, p. 98. 



LOWER FIG. a. Fruit of Malva 

 borealis. 6. Same, showing the 

 bracts of the persistent calyx, 

 c. Kellogg's Lav&tera. (L. assur- 

 gentiflora.) 



MALVA. 



Malva parvifiora, Linn., is distinguished from M- 

 borealis by the calyx lobes spreading away from the 

 fruit and the smaller flowers. 



Malva r otundifolia , Linn., is distinguished from these two species by akenes 

 rounded on the back, so as to make the fruit somewhat scalloped. 



The so-called Marsh mallow is not a Malva, and would better be called Marsh Holly- 

 hock. It probably does not grow on this coast. 



SIDALCEA. 



S. Henderson!, Wat. Simple stems, 3-4 feet high, glabrous: flowers 9-12 lines 

 long: carpels smooth and beaked. Oregon. 



S. Hickmanii, Greene. Rough with stellate hairs: stem leaves round fan-shaped: 

 racemes numerous, axillary and terminal, few flowered: short pedicels, subtended by 3 

 slender bractlets, 5 lines long: corolla an inch broad: akenes nearly orbicular. Canyons, 

 of Salinas Valley. 



S. secundiflora, Greene, is var. minor of S. diploscypha, in this book. 



MALVASTRTJM. 



M. Parryi, Greene. Annual: purplish and rough hairy branches, 1-2 feet long: 

 hoary with stellate hairs: flowers mostly solitary on peduncles 1-4 inches long: involucel 

 of 3 slender bracts: petals deep purple, 5-9 lines long: carpels 15-20. 



