80 American Midland Naturalist Mor^oGRAPH No. 7 



1 . Leaves of the flowering branches tomentose beneath, finely serrate, 

 gradually short-acuminate; woods, Hardin and Pope counties. 

 June- July. White Basswood T. hctcrophylla Vent. 



23. Malvaceae Necker — Mallow Family 

 1. Pistil consisting of several carpels united in a ring around a central axis, 

 but usually separating at maturity; stamen-column anther-bearing at 

 the top. 

 2. Carpels 1-ovuled and I-seeded. 

 3. Plants with perfect flowers. 



4. Calyx subtended by an involucre of 6-9 connate bracts; tall plants 



with showy flowers 1. Althaea 



4. Calyx subtended by usually 3 separate bracts, or these sometimes 

 lacking. 

 5. Stigmas linear, on the inner side of the style-branches; petals 

 rose, purple, or white. 

 6. Petals obcordate; carpels beakless 2. Malva 



6. Petals truncate, sometimes dentate or fimbriate; carpels beaked 



3. Callirhoe 



5. Stigmas capitate, terminal; petals yellow, small. 



7. An involucel present at the base of the calyx; leaves linear 



4. Malvastrum 



7. Involucels absent; leaves ovate-lanceolate. 



8. Flowers yellow; leaves with a short spine at base 5. Sida 



8. Flowers pale blue; leaves without spines 6. Anoda 



3. Plants dioecious; petals white: carpels rugose-reticulate; leaves 



palmately 5- to 11-lobed 7. Napaea 



2. Carpels 2- to several-seeded; stigmas capitate or truncate, terminal. 

 9. Petals yellow; involucre none; carpels 10-17; leaves long-petioled, 



velvety-pubescent, cordate, acuminate, 6-30 cm broad 8. Abutilon 



9. Petals pink or rose; involucre of 3 narrow bracts; leaves palmately 



lobed 9. Iliamna 



1. Pistil consisting of 3-5 united carpels, becoming in fruit a loculicidal 

 several-seeded capsule; stamen-column anther-bearing below the summit; 

 flowers large, showy. 



10. Bractlets six or more, linear 10. Hibiscus 



10. Bractlets three, broadly cordate 11. Gossypium 



1 . Althaea L. — Hollyhock 



A. rosea (L.) Cav. Roadsides and waste ground, occasional; native 

 of China. 



2. Malva L. — Mallow 

 1. Petals not more than twice as long as the sepals. 



2. Leaves crisped on the margins; carpels reticulate; stem stout, 

 erect, 0.5-2 m tall; escaped froin cult.; native of Eur. July- 

 Sept M. crispa L. 



2. Leaves not crisped. 



3. Stems erect; petals 5 mm long; carpels 8-11, more or less 

 pubescent and rugose on the back; weed in waste places; 



