4% 



BOTANICAL SURVEY OF DISMAL SWAMP REGION. 



Epidermis alike on botli faces, the cells large, with strongly undu- 

 lated radial walls; cuticle rather thick, granular. Stomata about 

 equally numerous on both surfaces, lying in all directions, sunken, 

 each bordered by three ordinary epidermis cells. Hairs rather thin- 

 walled, tapering to a rounded apex, pericellular, colls in a single 

 row (sometimes as many as sixteen), each hair surrounded by several 

 radially arranged foot cells. 1 



Palisade on each face, inclosing the thin central stratum of pneu- 

 matic tissue. 



Pin. 87. — Hypericum pilotum, loaf, ft. Hair from ventral faco magnified 1 13 tiinos; l>, same mapj 

 niflert 4H0 tlmen; r, portion of epidermis showing stoma, magnified 480 times. 



Hypoderrtutl coUenchyma above and below the midvein, more 

 strongly developed below. 

 Stereome none. 



Lechea maritima Lejjjrett. 



Belongs to the Sand Strand formation, growing abundantly among 

 the open dunes with Hudsonia tomentosa . 

 Leaf isolateral, pilose, with long hairs. 



'Such multicellular, unbranched hairs have not been hitherto detected in 

 Hypericaceae, so far as I can learn. Vesque (Comptes Rendns. vol. 100. p. 10M). 

 1885) found stellate hairs with a stalk consisting of a single row of cells in three 

 generaof Vismieae— Vismia, Psorosperinum. andHaronga. Solereder (Syst. Anat., 

 p. 135) mentions only liairs of that type as occurring in Hypericaceae. nor does 

 lie mention the occurrence of any kind of hairs in the tribe Hypericeae. 



