376 FIELD MUSEUM or NATURAL HISTORY BOTANY, VOL. II 



CHAM^SYCE S. F. Gray, Nat. Arr. Brit. PL, 2:260. 1821. 

 (# YPERICIFOLI&} 



Chamaesyce Lansingii Millsp. sp. nov. 



Hirta, ad rami pilis canescentes ad folii longe et sparse pilosi; pro- 

 strata alternatim pauci ramoso; foliis brevissime petiolatis e basi 

 oblique, oblongo-ovatis, acutis, margine acute et plene serratis, stipulis 

 deltoideis. Involucri pauci ad basi foliis supremis, longe peduncu- 

 latis, anguste turbinati extus glabri intus ad fauci longe pilosi, lobis 

 integris (excepta duo ad sulci lace ratis), triangularis in ligula pro- 

 longatis, glandularum appendice ovata, alba crebro roseo coloratis, 

 integris. Capsulag glabrse, coccis minus carinatis; semine nigro- 

 argenteus ovoideo-quadrangulatis minute et transverse anastomoso- 

 rugulosis. 



Plants rather firm stemmed, branches lurid, appressed-downy, 2-3 

 dm. long, internodes about 2 cm., leaves 1.2-1.8 cm. long, 6-8 mm. 

 broad, petioles 1.5-2 mm. long, seeds 1.2 x .9 mm. Inflorescence soli- 

 tary in the axils. 

 Type locality: ILLINOIS. Collected by Odell E. Lansing, Jr., in paved 



ditches of Chicago streets, August 6, 1898, No. 402. Type in herb. 



Field Museum of Natural History, Chicago, sheet No. 196.668. 



Mr. Lansing re-collected the plant in the original locality in 1908, 



finding the plants -persisting in all characters. 



Distribution: ILLINOIS and WISCONSIN to MASSACHUSETTS and south- 

 ward. 



Chamaesyce Rothrockii Millsp. sp. nov. 



Glabra, caule erecto, simplici vel alternatim ramoso, teretis, inter- 

 nodiis elongatis; foliis brevissime petiolatis e basi oblique, oblongo- 

 ovatis, acutis, margine serratis; stipulis triangulatis ad apice laceris; 

 cymis pauci floralis, terminalibus foliis supremis basi suffultis, in- 

 volucri anguste-turbinati extus et intus glabri, lobis integris, triangularis 

 in ligula prolongatis, glandularum appendice alba plus minusve rudi- 

 mentariis, albis, ovalis, integris. Capsulae glabrae; coccis carinatis; 

 semine fusco-olivaceus, ovoideo, quadrangulis, transverse anastomoso- 

 rugulosis. 



Plants firm stemmed, branches terete, ligneous, 3-4 dm. long, 

 internodes 3-5 cm. long; leaves 1-1.5 cm - l n g> -5~-& cm. broad; petioles 

 2-3 mm. long; inflorescence 2-6 flowered; seeds 1.3 x .8 mm. 



