398 



Illinois Natural History Survky Bulletin 



Vol. 26, Art. 5 



prairie and sumac. Ursa prairie was vis- 

 ited August 11 and September 9, 1950; 

 June 2 and July 14, 1951. 



Rock Greek. — Located north of Rock 

 Creek, in the northwest quarter of sec- 

 tion 25, T. 1 N., R. 9 W., Adams Coun- 

 ty, this prairie when visited covered more 

 than an acre of a ridge of sandy loess. 

 Andropogon scoparius was the dominant 

 grass; A. </eraidi and Boutelotta ciirtipen- 

 ilulti were present. AscUpias stenophyllii 

 and (Jheiiop'trlimii leptnphyUuni occurred 

 in the interspaces. Fsoriilin Itiiitiflora 

 was common on the gentle lower slope 

 and the almost level top, hut was infre- 

 quent on the steeper slopes. RiKk Creek 

 prairie was visited September 8, 1949; 

 August H, 1950; April 25, June 2, and 

 July 14, 1951. 



Honian. — This name, which is also 

 the name of the creek to the east, here 

 designates the small hill prairie that in 

 1951 occupied slightly more than an acre 

 in section II. T. 1 S.. R. 9 \V'., about 3 

 miles nortli of (Juinc\. Prairie covered 

 the west- and southwest-facing slopes of 

 the southern tip of a ridge that ends at 

 Homan Creek. The crest of the ridge 

 was almost covered with Rhus glabra. 

 Psoralen teiiiiiflura, Petalnsteiiium can- 

 didiim, and Melil'itus alba. A few indi- 

 \iduals of Asdepias steiiophylla and Del- 

 phinium raroliiiianur/i occurred there as 

 well as on the slopes. Vegetation of the 

 east-facing slope was principally a mi.x- 

 ture of prairie and sumac. A ndropogon 

 scoparius dominated the west- and south- 

 west-facing slopes. Bouteloua curtipen- 

 ditla occurred in scattered patches. This 

 site was visited on April 25, June 2, and 

 July 16, 1951. 



Parker Heights. — This small hill 

 prairie, which occupied the south part of a 

 ridge in Parker Heights, a park about a 

 mile north of Quincv, Adams County, 

 was visited May 28, 1950, and July 16, 

 1951. Disturbed prairie, much trampled 

 bv people, covered the west- and south- 

 west-facing slopes above the exposed 

 limestone bedrock. 



Hidden Lake. — The pond within the 

 quarrv in the southeast quarter of sec- 

 tion 23, T. 2 S., R. 9 W., about 2 miles 

 south of Quincy, provided the name for 

 this site. A wall of limestone which forms 



the north and east limits of the lake is 

 covered with a thick mantle of loess to 

 form the bluff. Above the bedrixk, the 

 mantle of loess forms an almost vertical 

 cliff with heights to 15 feet, and above 

 the loess cliff is the gentle west- and 

 southwest-facing brow slope of the bluff. 

 Hidden Lake prairie, when visited Sep- 

 tember 8, 1949, and May 28, July 2, Au- 

 gust 13, and September 9, 1950, covered 

 about 0.2 acre of this slope. The steep loess 

 face was almost without vegetation except 

 at its junction with bedrock. Small shrubs 

 occupied this junction. The prairie had 

 been much disturbed by human tram- 

 pling, because the site attracted numerous 

 bo\s from nearby Quincy. Andropogon 

 scoparius was dominant on the slopes. A 

 dense stand of Rhus glabra, Melilotus 

 alba, and ./. scoparius occupied the crest 

 of tile ridge. Tridcns flavus was fre- 

 quent. 



Seehorn Cemetery.— This prairie, lo- 

 cated on the uppermost slope of the bluff, 

 in the southeast quarter of section 26, T. 

 3 S., R. 8 W., Adams County, was vis- 

 ited September 9, 1950. Prairie occupied 

 the cemetery and some of the slope to the 

 northwest and southeast. Downslope 

 there was a mixed forest; upslope a bit of 

 prairie was found between the cemetery 

 and the cultivated upland. Sorghastruni 

 nutans was the dominant grass. Andro- 

 pogon gerardi, Bouteloua curtipcndula, 

 and Psoralen Icnuiflorn were common. 



Fall Creek. — This prairie in 1950 oc- 

 cupied the bluff about one-quarter mile 

 south of Seehorn Cemetery prairie. Mixed 

 forest occupied the coves ; forest, or a 

 mixture of prairie and forest, covered the 

 spurs. Andropogon scopnrius, A. gerardi, 

 and Sorghastruin nutans appeared equally 

 abundant. Interspaces between the 

 bunches of grass were small. This area 

 was visited September 9, 1950. 



North Pandarniie. — This name des- 

 ignates a group of spurs and coves on the 

 bluffs in section 31, T. 3 S., R. 7 W., 

 and section 36, T. 3 S., R. 8 W., north 

 of Pandarmie Hollow, 2.5 miles south- 

 east of Fall Creek, Adams Count\. 

 When North Pandarmie was visited Sep- 

 tember 9, 1950, forest occupied the coves; 

 a mixture of prairie and forest covered 

 the spurs. Andropogon gerardi and Sor- 



