40 



ARACEAE— COMMELINACEAE— LILIACEAE 



Plate 16: A Acorus calamus; B, Symplocarpus foetidus, 1, spathe, 2. spadix, 3, flower; 

 L, Lalla palustns; D, Ansaema dracontium; E. Arisaema triphyllum, 1, spathe, 2. spadix 

 3, pistillate flower, 4, staminate flower. 



Acorus — Sweet Flag: 



o 



(Gr. akoros, sweet flag) 

 PI. 16, fig. A. 

 Leaves sword-shaped ; spadix apparently lateral on a triangular scape 



Symplocarpus — Skunk Cabbage 



(Gr. symploke. connection, karpos. fruit) 

 (Spathyema) 

 PI. 16, fig. B : 1. 2, 3 

 Leaves broad, simple, ill-smelling when crushed 



Calla — Water Arum 



(L. calla, name of a plant) 

 PI. 16, fig. C 

 Leaves heart-shaped ; spathe open, white 



A. calamus 



S. foetidus 



C. pahistris 



Arisaema — Jack-in-the-pulpit, Dragon Root 



(Gr. arisaron, arum, haema, blood) 

 PI. 16, fig. D: E : 1, 2. 3, 4 



1. Leaves witli 3 leaflets; spadix covered by spathe A. triphyllum 



2. Leaves with 5-17 leaflets; spadix exserted beyond the spathe A. dracontium 



Liliales Lily Order 



Commelinaceae — Spiderwort Family 

 Grass-like herbs with fleshy leaves and muciltginous sap: sepals 3, petals 3, stamens 6, ovary 

 3-celled ; flower syncarpous, anopetalous, hypogynous, regular. 

 Sepals green, petals colored Tradescmtia 



Trade scan tia — Spiderwort 



i Xamed for Tradescant) 



1. Sepals and pedicels smooth 7". reflexa 



2. Sepals glandular pubescent 



a. Leaves and bracts 5-10 mm. wide T. occidentalis 



b. Leaves and bracts 1-2 cm. wide T. bractedta 



Liliaceae — Lily Family 

 (Including the Melanthaceae and Convallariaceae) 

 Herbaceous plants, with scapes or leafy stems growing from bulbs, corms or rootstocks ; sepals 

 3. petals 3, stamens 6, ovary 3-celled ; flowers sy learpous. apopetalous or sometimes sympetalous, 

 hypogynous, regular. 



I. Sepals green, petals colored; leaves in a whorl of 3, broad Trillium 



II. Sepals colored like the petals 

 1. Native plants 



a. Flowers in a cluster at the top of a leafless stem, i. e., a scape 



(1) Plant bulbous, with a strong onion-like odor Allium 



i 2^ Plant with a rootstock. nearly odor' Cliiitonia 



