June, 1907.] 



Succulent Plants of Ohio. 



187 



storing up enough water to last from one rainy season to another. 

 These cells are highly specialized, being comparatively large and 

 with thin walls. Many of the typical leaf succulents develop 

 rosettes as in Sempervivium tectorum. 



Stem succulents have thickened fleshy stems which perform 

 the functions of leaves. Here the stomata are found in the epi- 

 dermis as in the foliage leaf and the green tissue is contained in 

 the cortex. In many stem succulents the stem becomes leaf- 

 like, or disk-shaped as in Opuntia. 



Among the fieshv, watery plants found in our moist woods 

 Galeorchis spectabilis is characteristic, while Adicea pumila is 

 a good example of the annual plants with delicate watery stems. 

 Probably our most abundant succulent, present almost every- 

 where in gardens and fields, is the common Purslane, Portidaca 

 oleracea. 



In the following list, the Ohio plants which might be con- 

 sidered in this connection have been arranged under two heads: 

 first a list of the more typical succulents, and second a general 

 list containing some of the semi-succulent plants present in our 

 flora. 



Typical Succulents. 



Galeorchis spectabilis (L.) Rydb. 

 Agave virginica L. 

 Chenopodiuni album L. 



glaucuni L. 

 Claytonia virginica L. 



" caroliniana Michx. 



" perfoliata Doun. 



Portulaca oleracea L. 



" grandiflora Hook. 



Cakile edentula (Bigel) Hook. 

 Brassica oleracea L. 

 Sedum telephiuni L. 



telephioides Michx. 

 " acre L. 



ternatum Michx. 

 Sempervivium tectorum L. 

 Oxalis violacea L. 

 Opuntia humifusa Raf. 



Semi-Succulent Plants. 



Chamaelirium luteum (L.) A. Gray. 

 Allivtm cepa L. 



" cernuum Roth, 

 stellatum Ker. 

 Erythronium Americanum Ker. 

 Peramium repens (L.) Salisb. 



pubescens (Willd.) 

 MacM. 

 Adicea pumila (L.) Raf. 

 Chenopodium leptophvlkmi (]\Ioq.) 



Xutt. 

 Blitum capitatum L. 

 Salsola tragus L. 

 Phytolacca decandra L. 



Caltha palustris L. 

 Sanguinaria canadensis L. 

 Bicuculla cucullaria (L.) Millsp. 

 canadensis (Goldie) 



Millsp. 

 eximia (Ker.) Millsp. 

 Saxifraga pennsylvanica L. 



" virginiensis Michx. 

 Chrysosplenium americanuin Sch- 



wein. 

 Impatiens biflora Walt. 



aurea Muhl. 

 Isnardia palustris L. 

 Monotropa uniflora L. 



