428 



Illinois Natural History' Sur\ev Bulletin 



Vol. 26, Art. 5 



was seen in hill prairie at Sunset Trail 

 and Ursa. 



Ostrya viryiiiiaiui (.Mill.) K. Koch. 

 American hop-hornbeam was found on 

 four rocky prairie slopes and also on one 

 loess slope. It was usually one of the trees 

 found in wooded coves. 



FaG.'VCEAE 



Qui'tctis alba L. WHiite oak saplings 

 or small trees were observed in loess prai- 

 rie at Sunset 1 rail, Hill- Top, and Foun- 

 tain Bluff. 



Quo (US i/i/iti(i(iirfiti .Michx. At Dev- 

 il's Backbone and Ursa a few saplinjis of 

 bur oak were found in the prairie. There 

 and at other sites it was found also in 

 the coves. 



Quercus marilandica Muenchb. Black 

 jack was represented by a few stunted in- 

 dividuals in the rock prairie at Govern- 

 ment Rock. 



(Juircus iiiuhhiihcif/ii Kngclm. bellow 

 or chinquapin oak occurred in 10 prai- 

 ries. It was more abundant in clefts of 

 limestone ledges, in coves, and on lower 

 bluff slopes than in prairies. 



Quercus stellata Wangh. Post oak oc- 

 curred as scattered individuals in se\en 

 prairies. It was common in woodland 

 borders in southwestern Illinois. 



Quercus velutina Lam. Black oak, like 

 other oaks a woodland jpecies, was found 

 in seven prairies, usually in the borders 

 between prairie areas and upland woods, 

 and occasionally as small solitary trees on 

 the prairie slopes. 



Ulmaceae 



Cellis laevigata Willd. Sugarberry, a 

 southern tree, most frequent in bottom- 

 lands, was represented by one specimen in 

 rock prairie at Government Rock. 



I'lmus alata Michx. W'inged elm was 

 found on the stony prairie slopes at Foun- 

 tain Bluff, Gmernment Reck, and Cave 

 Creek. 



Ulmus rubra Muhl. \'er\- small indi- 

 viduals of slippery elm were found in 

 eight hill prairies. 



MOR.^CEAE 



Madura pomifcra (Raf. ) Schneid. 

 Osage orange was ubser\ed in the pas- 

 tured loess prairie at \Valnut Creek and 



also in the prairie near woodland at Prin- 

 cipia. In some other localities it was abun- 

 dant in pastured woods on the basal slopes 

 of bluffs. 



Cannabinaceae 



*(Jan>ia//:s sativa L. Common hemp, 

 abundant in some pastured sand areas of 

 Illinois, was seen at South New Canton, 

 a pastured bill prairie. 



Santai.ace.ae 



(J'liiiaiitlra unibellata (L.) Nutt. [C. 

 ruhanlsiana Fern.] Bastard-toadfla.x was 

 found on 13 loess antl 7 rocky prairie 

 slopes from El Rancbo and Devil's Back- 

 bone south to Renault. 



Polygonaceae 



Polyynnuiii tenue Michx. Slender 

 knotweed was collected from the rocky 

 prairie slopes and the sandstone ledges at 

 l'"ountain Bluff. 



ChI'NOPOULACEAE 



Chenopodium leptophyllum Nutt. [C. 

 pratericola Rydb.] 'Fhe narrow-leaved 

 goosefoot was found in sandy loess at 

 lialk and Rock Creek. 



.NVCTAGINACEAE 



Mirnhilis iiyctaginea (Michx.) MacM. 

 Umbrella-wort was found in onh' one hill 

 prairie. Devil's Backbone. 



Car^ophyllaceae 



(Jcrasliu/ii nutans Raf. Nodding mouse- 

 ear cbickweed occurred in \'alnie\er and 

 F'ountain Bluff prairies. 



*Cerastiuni vulgatuin L. Common 

 mouse-ear cbickweed was found in loess 

 at Seehorn-Payson. 



*Saporiaria officinalis L. Bouncing-bet 

 was found in loess at Homan. 



Silcne antirrhina L. Sleep\- catchfly 

 was observed in nine rock or loess prairies 

 and in crevices of rock ledges at the bases 

 of four prairies. 



Ran u xcu lac eae 



.1 nr/nonc canadensis L. Meadow anem- 

 one was found in Bielema hill prairie. 



.Ineiitone cylindrica Gray. The long- 

 fruited anemone occurred in 14 hill prai- 

 ries, mostly in loess. 



