ADDENDA. 531 



Stm about 2 feet high and like all the other species of this g«nus, 



flrj and harsh. JLeaf es, scarcely a line in breadth, the Io« er ones , , 

 inches long, the upper very sliort. Sheath open, shorter than the in- 

 ternodes, sometimes very hairy. Panicle composed of a few small, one 

 or 2 flowered brunches. Calyx nearly equal, very acute, glabrous, 

 purple. Corolla longer than the calyx, exterior valve purple, villous 

 along the margins and back, deeply cloven. Tlie midrib about dou- 

 ble the length of the corolla and apparently very slightly connected' 

 "With it J erect when young, recurved and frequently persistent when 



i^ince the publication of the first number of this work, the Aira Pur- * 

 purea has been proposed by Mr. Nuttall as the type of this new ge- 

 nus, to which he has added a second species from Jersey and Dela- 

 ^*f^ (U* Aristulata ) This wil constitute a third species of a genus 



th 



hich 



ceoktis : floribus axillari- 

 ^us, sessilihiis ; petalis 

 calycem sequantibus. E. 



late-lanceolate ; flowtrs 

 axillary, sessile ; petals 

 as long as the caljx. 



. The whole plant clabrous, creeping along the borders or swimming 

 W the waters of shallow streams, somewhat succulent Leave$ en- 

 tire, with an attenuated base nearly half an inch long, flowers soli- 

 wry, axillary, sessile. Leaves of the calt/x acuminate. Petals \eU 

 hiw, as long as the calvx. Stamem about as long as the petals. Cap- 

 s«/e finely attenuated at base. 



'his plant has a striking affininity to the L. palustris of this woik, 

 (Isnardia palustris auct :) it appears to differ only b> its greater size, 

 JJ'lwch may be owing to situation ; by the presence of petals, and by 

 tne capsules, which taper more at the base. 



Crows in small running streams, in Barnwell district, near the 

 ^oart house. 



'lowers durinir the summer. 



RUPPIA. Gen. pi. 235. 



^alijx 0. Corolla Q. \ Calyx Comlla o, 

 ^miua 4, pedicellata. I Seed *, pedicellate. 



Maritima. 



Sp.pl, 1, p. 717. Lamarck illust.pl. 90. 



Root probably perennial. Stem long floatiog, g'abrouf- 

 wnatp filifr. — ^Ik-^.r^^ ^v.^ ct^m a* hase with an mflai 



Liaw$ 



iavreti 



e species yet known are very conformable in habit. j^ 



LuDwiGiA Nataks. E. 



L, natans, repensque, | Swimminp: and creeping; 

 oppositis, spathulato Ian- leaves opposite, spathu- 



^ 



