OF THE GENERA. XXXV 



Valeriana. Calyx with the hmb involute, and at length evolved in a 

 deciduous plumous pappus. Corolla with the tube obconic or cylindric, 

 equal or gibbous at base, the hmb obtusely 5-cleft, Fruit indehiscent, 1- 

 celled, 1-seeded. Valerianacecc^ p. 153. 



** Perianth single, superior. 



Iris. Perianth 6-cleft ; 3 of the segments terger and reflexed, the others 

 erect. Stigmas 3, petaloid, covering the stamens. Iridacece, p. 333. 



Lachnanthes. Perianth 6-cleft; segments unequal. Stigma minutely 

 3-lobed. Capsule 3-celled, truncate, many-seeded. HcEmodcyracece, p. 376. 



*** Perianth double , inferior. 



_ CoMMELYNA. Perianth in 2 rows ; the outer one 3-leaved, calycine ; 

 inner 3-leaved, petaloid. Capsule 3-celled, 3-valved ; one valve abortive. 

 CommelynacecB, p. 377. 



Xyris, Perianth in 2 rows ; outer row glumaceous, 2 of the segments 

 somewhat boat-shaped ; inner row petaloid ; the segments with long nearly 

 distinct claws and dilated laminae. Capsule 1-celled. Xyridaceoe, p. 371. 



**** Perianth single, inferior. 



ScHOLLERA. Spathe 1-flowered. Perianth with a long slender tube; 

 hmb deeply 6-parted. Anthers similar, oblong-sagittate. Stigma 3-lobed. 

 Capsule 1-celled. PontederacecB, p. 370. 



Heteranthera. Flowers in a spathe. Perianth with a long slender 

 tube ; border 6-parted, equal. Anthers of two forms. Capsule 3-celled. 

 many-seeded. Pontederacea, p. 369. 



Sisyrinchium. Spathe 2-Ieaved, bract-like. Perianth colored; limb 

 flat, 7-cleft ; the lobes equal ; tube short. Filaments mostly united below. 

 Stigmas 3. Capsule pedicellate, roundish-triangular. Iridacece, p. 354. 



***** Flowers glumaceoils {dry and chafy.) 



^^l'„ ^^^ ^^^ genera of this division belong to the Subclass Glumaceals, 

 (p. 387,) and all except Cenchrus, Spartina, and Oryzopsis, belonff to the 

 Order CyperacecB, p. 387. ^ ^ j & 



Order II.— DIGYNIA.— 2 PistUs. 



Obs, All the genera of this order are proper grasses, Graminacece, p. 418. 

 The family is so entirely natural that it is unnecessary to repeat the generic 

 descriptions. -^ e *= 



Order III.— TRIGYNIA.— 3 Pistih. 



MoLLUGO. Calyx inferior, deeply 5-parted. Petals none. Capsule 3- 

 celled, 3-valved, many-seeded. Caryophyllacem, p. 47. 



Lechea. Calyx inferior, 3-sepalled, with two outer bracts or sepals, per- 

 sistent. Petals 3, inconspicuous, lanceolate. Stigmas 3, scarcely distinct. 

 Capsule 3-celled, 3-valved, few-seeded. Cistacece, p. 35. 



Proserpinaca. Calyx superior, the tube adhering to the triquetrous 

 ovary ; hm,b 3-parted. Petals none. Fruit bony, 3-sided, 3-celled. Halo- 

 ragacece, p. 111. 



