132 MALVACEAE 



2. CALLIRRHOE Nutt. Poppy Mallow. 



Involucel bracts three or none. Styles and stigmas as in Malva. 



Involncel bracts none. 1. C. alceoides. 



Involucel bracts three. 2. C. involucrata. 



1. C. alceoides (Michx.) Gray. 1° high, erect: leaves triangular- 

 heart-shaped, 5-7-lobed, the divisions linear to ovate, toothed : flowers 

 light pink, V broad. — Occurs rarely as a waif at Shef3Seld. May-June. 



2. C. involucrata (T. & G.) Gray. l°-3° long, spreading: leaves or- 

 bicular, palmately lobed, the lobes cleft and toothed : flowers reddish, 

 purple, 1^-2' broad. — Rarely occurs as a waif near Shefiield and Green- 

 wood. June-August. 



3. MALVASTRUM A. Gray. 



Stamen column anther-bearing at summit. Stigmas capitate. Seeds 

 ascending. 



1. M. angustum A. Gray. Yellow Mallow. Annual, 6^-20' high, 

 appressed-pubescent : leaves oblong-lanceolate, dentate : flowers axillary : 

 bractlets setaceous : petals small : sepals enlarging in fruit. — Often com- 

 mon in barrens, especially in the southern part. June-September. 



4. SIDA L. 



Differs from 3Ialvastruvi chiefly in having pendulous seeds. 



1. S. spinosa L. Prickly Mallow. Annual, l°-2° high : leaves 

 ovate-lanceolate, serrate, bearing 2 or 3 small tubercles at the base of the 

 slender petiole : flowers axillary, 2^^-4^^ broad. — Abundant in open 

 grounds. July-October. 



5. ABUTILON L. 



Involucels none. Stamen column anther-bearing at apex. Stigmas 

 capitate. 



1. A. Avicennae Gaertn. Velvet Leaf. Annual, 2°-6° high, vel- 

 vety-pubescent : leaves cordate, acuminate, long-petioled, crenulate : 

 flowers yellow, axillary, 6^^ broad. — A common weed in waste places. 

 June-October. 



6. HIBISCUS L. 



Involucel bractlets numerous. Stamen column anther-bearing for much 

 of its length. Stigmas capitate. Ovary 5-celled. 



Glabrous perennial. 1. II. militaris. 



Hairy annual. 2. H. Triomim. 



1. H. militaris Cav. Rose Mallow. Bushy, 3°-8° high : leaves tri- 

 angular in outline, strongly 3-parted, toothed : flowers pinkish, 3^-5' 

 broad. — Locally common in swamps near Sibley, Atherton and Leeds. 

 June-September. 



2. H. Trlonum L. Flower-of-an-Houk. 1°-2° high : leaves 3-7- 

 lobed, the lobes toothed and cleft : flowers yellow with a black center: 



