ADDITIONS. 



Culm erect and mostly simple, numerously jointed, nodes 

 and stipules pilose, leaves subulate and scabrous, above 

 shorter than the slieathes; lateral floral branchlets clandes- 

 tine, terminal ones partly exserted, spikelets 2 and 3-flow'- 

 ered, with a terminal abortive rudiment; calix glume much 

 shorter than the corolla, partly lacerate at the points; co- 

 rolla minutely stipiiate, margin of the outer glume ciliate, 

 the summit truncate and trifid, with the intermediate awn 

 no longer than the lateral cusps, inner valve incurved, 

 shorter than the outer, producing 2 cristate tufts of pubes- 

 cence. 



p. 74. KoELERTA, * pmiiculaia. Panicle oblong, smooth; spike- 

 lets 2 and 3-flowered, shining, glumes awnless; valves of 

 the calix very unequal, the larger one trunca^ely obtuse. 

 Hab. Collected in East Florida by my friend Mr. T. Say, 

 Distincily allied to Aira crlstata of Smith, Flor. Brit, but a 

 much larger plant- Leaves and sheathes long. 



p. 8r. AsPERELLA, fEhnnus HyatrixJ. The American plant 

 appears to be specifically distinct from that of Europe, 

 having a setaceous rudiment of a calix, and not merely a 

 callosity. 



n. 104. RiviNA, add 2. hwnilis. Discovered in East Florida, by 

 Mr. Say. 



\'j. lOS. after No. 160, add,--[CUSCUTA. Calisc 4 to 

 5-cleft. Corolla 4i or 5-cleft. Cafistde 2-ceIled, 

 openino^ transversely all round towards the base. 

 (Stamina often 4.) 



Leafless filiform and herbaceous, parasitic and twining 

 upon surrounding plants; flowers conglomerate or rarely 

 racemose. 



Species. 1. C. americana. — Flowers mostly pentaa- 

 drous and sessile. 



Of this singular genus there are 3 other species in Eu- 

 rope, 2 in Peru, 1 in China, 1 in India, and another at the 

 Cape of Good Hope.] 

 j>. 110. TiLL.^A, * simple jc^. Stem erect and simple; leaves con- 

 nate, oblong-linear and somewhat acute; flowers alternate, 

 sessile; petals erect, twice as long as the calix. — Journal 

 Acad. Philad. 1. p. 114. Omit, T? cimosa; for v.hich See 

 DiAMORPHA, p. 293. 

 p. 112. Mvosori^, * veriia. Small and hirsute; stem simple; 

 radical leaves spathulate-oblong, cauline linear-oblong, ob- 

 tuse; spikes simple; flowers subsessile; seeds smooth and 

 shining. Had. In sandy woods and way-sides, New Jei'- 



