ABISTOLOCHIACEAE 35 



1. Trees. 2. 



Shrubs: buds small. C. pumila. 



2. Leaves entire and glabrous: buds small. C. mississippiensis. 

 Leaves toothed or pubescent: buds larger. C. occidentalis. 



Family ARISTOLOCHIACEAE. Birthwort Family. 



A rather small family, chiefly of herbs, of little use except 

 that species of Aristolochia (e. g. the goose-flower) are often 

 grown under glass for their large or peculiar, usually ill- 

 scented, flowers. 



ARISTOLOCHIA. Dutchman's Pipe. 



Woody twiners (as here considered) with brown wood with 

 large diffused ducts and broad wedge-shaped medullary rays; 

 for a time green sympodial stems swollen at the nodes; pale 

 homogeneous roundish pith; rounded alternate superposed few- 

 scaled small buds encircled by the leaf-scar; U-shaped leaf- 

 scars with 3 bundle-traces; no stipule-E'cars; simple large cor- 

 date leaves; axillary perfect pipe-shaped apetalous epigynous 

 flowers, green with brown or lurid throat; and rather large 

 hanging basket-like capsules with flat s'eeds. 

 Glabrate: flower with smooth segments. A. macrophylla. 



Velvety: flower with rugose segments. A. tomentosa. 



Family CARYOPHYLLACEAE. Pink Family. 



A rather large family of herbaceous plants much used in 

 flower-gardening and including the "carnation" of florists: the 

 following and some other dense-growing species occasionally 

 employed in rock-gardens. 



SILENE. Moss Campion. 



Mostly perennial herbs with opposite sessile leaves; no 

 stipules; mostly perfect "pink"-like polypetalous flowers with 

 3 carpels; and 1- or partly 2-celled many-seeded capsules dehis- 

 cing at the top. 

 Low, matted, with crowded linear leaves, S. acaulis. 



