April, 1913.] Liliales of Ohio. 123 



4. Smilax pseudo-china L. Long-stalked Greenbrier. A 

 glabrous climbing woody vine, commonly covered with numerous 

 slender prickles. Branches more or less angled; petioles 1-1>^ in. 

 long; leaves ovate, abruptly acute at the apex, subcordate at the 

 base, usually 1 -nerved; with 12-40 flowers; fruit a black berry. 

 In thickets. General. 



5. Smilax glauca Walt. Glaucous Greenbrier. A climbing 

 woody vine with terete stem and four-angled branches and glau- 

 cous leaves. Stem often prickly; peduncle }4~1 in. long; leaves 

 ovate, acute or cuspidate at the apex, sometimes cordate at the 

 base, five-nerved; umbel 6-12 flowered; fruit a blue-black berry. 

 In dry, sandy soil. General, but more abundant in the south. 



6. Smilax rotundifolia L. Round-leaf Greenbrier. A gla- 

 brous woody climber with a terete, woody stem and a square 

 branch usually prickly. Petioles less than }4 in. long; leaves 

 thick, shining when mature, acute or acuminate at the apex, 

 obtuse or cordate at the base, entire or very slightly denticulate, 

 5 nerved; peduncles flattened; umbel 6-25-flowered ; fruit a black 

 berry. In woods and thickets. Cuyahoga, Belmont, Hocking, 

 Fairfield, Licking, Lorain. 



PoNTEDERiACEAE. Pickerel-wccd Family. 



Perennial, aquatic herbs with broad, petioled leaves or long, 

 grass-like leaves. Flowers bisporangiate, showing some zygo- 

 morphy, solitary or spiked with a spathe; perianth of six united 

 segments; stamens G or 3, united with the perianth; ovulary tri- 

 locular or unilocular; stigma terminal ; fruit a many seeded capsule; 

 endosperm of the seed copious, mealy. 



1. Spike many-flowered, with a spathe-like bract, perianth two-lipped, 



stamens 6. Pontederia. (1) 

 1. Inflorescence one to several-flowered, perianth with a slender tube, 



perianth segments about equal, stamens 3. Heteranthera. (2) 



1. Pontederia L. Pickerel-weed. 



Herbs with thick leaves, long sheathing petioles and hori- 

 zontal rootstock. Inflorescence a spike with numerous, eph- 

 emeral, blue flowers; perianth two lipped; stamens 6, united with 

 the perianth; ovulary trilocular, 2 locules without ovules. 



1, Pontederia cordata L. Pickerel weed. A rather stout, 

 erect herb with ovate or cordate, sagittate leaves, with apex and 

 basal lobes obtuse, the sheathing petiole often having long ap- 

 pendages; spathe and inflorescence pubescent; flowers blue, the 

 upper lobe having two yellow spots on the middle segment. 

 Borders of ponds and streams. Erie, Cuyahoga, Geauga, Sum- 

 mit, Portage, Wayne, Lucas, Fulton, Defiance, Licking, Perry. 



Pontederia cordatalancifolia (Aluhl.) Mor. Similar to the 

 preceding but with lanceolate leaves, rounded or narrowed at 

 the base. Summit County. 



