TILIACB^ — MALVACB^ — CISTACE^ 89 



LII. TILlACE^ (Linden Family). 



Trees with alternate simple leaves, fibrous inner bark, and flowers 

 in axillary or terminal panicles or cymes. Sepals 5, deciduous; 

 petals the same number, fewer or none; stamens numerous, often 

 in groups; fruit drupe-like or berry-like. 



1. TILIA. Basswood. 



Sepals 5; petals 5, spatulate, with scales at the base; stamens 

 numerous, united in 5 groups; fruit dry, woody, and indehiso'ent. 

 Large trees with soft white wood, and cymes of cream-colored, sweet- 

 scented flowers. 



1. T. americana, L. 



Leaves large, glabrous, heart-shaped, serrate, oblique; fruit ovoid. Rich 

 woods, Red River Valley. 



LIII. MALVACEiE (Mallow Family). 



Herbs or shrubs with alternate, mostly palmately veined leaves 

 with deciduous stipules and regular flowers. Sepals 5, united at 

 the base, persistent, sometimes with a number of bracts on the 

 outside; petals 5, with short claws, united at the base; stamens 

 numerous, their filaments united in a tube and joined with the base 

 of the petals; styles mostly as many as the cells of the ovary, 

 united below, distinct above, and generally projecting beyond the 

 stamen tube; pistils several, united in a ring. 



1. MALVASTRUM. False Mallow. 



Calyx with 2 or 3 bractlets or none; petals often notched at the 

 apex; styles 5 or more; seeds kidney-shaped. 



1. M. coccineum, (Pursh.) Gray. 



A low, hoary, perennial herb with 5-parted palmate leaves, and reddish 

 pink flowers in short racemes or spikes. Dry soil, from the Red River Valley 

 westward. 



LIV. CISXACEiE (Rock Rose Family). 



Shrubs or low, somewhat shrubby herbs with simple leaves and 

 regular" flowers, solitary or variously clustered; sepals 3-5, per- 

 sistent, when 5 the two outer smaller; petals 3 or 5 or wanting; 



