12 KEY TO THE SPECIES 



2. Vagnera amplexlcaulis (Nutt.) Greene. Stems 4-8 dm. high ; leaves 

 ovate to broadly lanceolate, clasping at base ; flowers in a small, close panicle ; 

 berry red. Not frequent ; in moist rich woods. 



2. DISPORUM 



The branching stems from slender rootstocks ; leaves alternate, clasping ; 

 flowers terminal, yellowish-white ; perianth of 6 narrow deciduous segments ; 

 stigma 3-cleft ; berry sub-globose. 



Disporum trachycarpum (Wats.) B. & H. Leaves ovate or narrower, 

 acute ; perianth segments whitish, acute ; ffuit lobed and roughened. Shaded 

 woody slopes. 



3. STREPTOPUS 



Stem stout, with forking and divergent branches ; leaves ovate, acuminate, 

 thin, clasping ; flowers small, the peduncles slender and twisted near the middle. 



1. Streptopus amplexifolius (L.) DC. Stems 6-10 dm. high ; the thin 

 smooth leaves glaucous below ; peduncles 1-2-flowered ; anthers tapering to a 

 slender point ; stigma entire, truncate ; berry oval. In moist woods. 



IX. IRIDACEiE (Ieis Family) 



Perennial herbs ; leaves linear, 2-ranked, equitant, sheath- 

 ing ; flowers perfect, the 6 perianth segments petal-like ; sta- 

 mens 3, with extrorse anthers ; style 3-cleft at the apex ; 

 ovary inferior, 3-celled, becoming a triangular pod with many 

 seeds. 



1. IRIS (Ibis. Flag) 



Tall herbs from thick rootstocks, with sword-shaped leaves and large showy 

 flowers ; the perianth segments united below into a tube ; the 3 outer ones (sepals) 

 reflexed and larger than the 3 erect inner (petals) ; divisions of the style petal-like, 

 arching over the 3 long stamens. (There are many handsome species in cul- 

 tivation.) 



1. Iris Missouriensis Nutt. (Western BLns Flas). Stem slender, the 

 leaves few, mostly basal, shorter than the stem ; flowers 1-3, with scarious dilated 

 bracts, light blue ; parts of the flower 5-7 cm. long ; capsule oblong, obtusely 

 angled, 2-3 cm. long. Common on wet lands. 



X. ORCHIDACEiE (Orchis Family) 



Herbs with alternate leaves, very irregular and often showy 

 flowers, 3 petal-like sepals, 3 petals (the lower one different 

 from the others and called the lip), a central column composed 

 of blended stamens and style, and an inferior 1-celled ovary 



