HYDKOPHYLLACEAE 155 



2. P. pilosa L. l-2 high, hairy to nearly glabrous : leaves linear- 

 lanceolate, acuminate, spreading : corolla lobes entire, reddish. Prairies 

 and barrens throughout the southern part, especially along the railroad 

 near Lee's Summit. April-May. 



3. P. divaricata L. l-2 high, finely pubescent : leaves ovate-lan- 

 ceolate, acute : corolla bluish, its lobes obcordate to entire. Common 

 throughout in damp woods. April-May. 



2. POLEMONIUM L. 



Perennial herbs with blue cymose-paniculate flowers. Corolla bell- 

 shaped. 



1. P. reptaiis L. JACOB'S LADDER. G'-SO' high, nearly glabrous- 

 leaflets 5-15, oblong-lanceolate, entire : flowers 6" broad : stamens in- 

 cluded. In rich woods near Westport (very rare), and along Sni-a-bar 

 Creek (abundant). April-May. 



FAMILY 105. HYDROPHYLLACEAE Lindl. 

 Generally hairy herbs with perfect, regular, cymose or racemose flowers. 

 Parts of calyx and corolla five each. Stamens five, alternate with the 

 corolla lobes. Ovary superior, 1 -celled, with two parietal placentae. 

 Styles two, united below (in ours). Fruit a 2-valved capsule. 



Stamens exserted. 1. HYDROPHYLLUM. 



Stamens included. 2. MACROCALYX. 



1. HYDROPHYLLUM L. WATKR LEAF. 



Corolla white or pale blue, bell-shaped, its lobes convolute in the bud, 

 with five linear appendages within. Ovary hairy. Seeds 1-4. Flowers 

 cymose. 



Stems nearly glabrous ; corolla lobes not appen- 



daged. 1. H. Virginicum. 



Stems hirsute ; corolla lobes appendaged. 2. H. appendiculatum. 



1. H. Virginicum L. Perennial, 8 / -20 / high : leaves pinnately divided 

 into 5-7 oblong, acute and cut-toothed lobes : flowers 3"-4" long. In 

 woods throughout. Rather common. May- June. 



2. H. appendiculatum Michx. Biennial, 12 / -30 / high : lower leaves 

 pinuately divided into 5-7 ovate and cut-toothed lobes : upper leaves 

 ovate, variously lobed: flowers 6 // -l // long. Common in rich woods. 

 May- June. 



2. MACROCALYX Trew. 



Annual herbs. Calyx 5- lobed, greatly enlarged in fruit. Corolla 

 whitish, about the length of the calyx, with five small appendages within. 

 Lower leaves opposite, upper alternate. 



1. M. Nyctelea (L. ) Kuntze. Stems pubescent, weak, at length 

 widely spreading : leaves ovate-oblong, divided into 7-13 oblong spar- 

 ingly toothed lobes : peduncles 1-flowered, opposite the leaves : corolla 

 about 2" long. Very abundant in moist places. April- June. 



