OP THE GENERA. XXXV 



VALERUNA. Calyx with the limb involute, and at length evolved in a 

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

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

 celled, 1-seeded. Valerianacca, p. 153. 



** Perianth single, superior. 



IRIS. Perianth 6-cleft ; 3 of the segments larger and reflexed, the others 

 erect. Stigmas 3, petaloid, covering the stamens. Iridacea:, p. 333. 



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

 3-lobed. Capsule 3-celled, truncate, many-seeded. Hcemodaracece, 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. 

 Commelynacece, 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. Xiiridacea, p. 371. 



**** Perianth single, inferior. 



SCHOLLERA. Spathe 1 -flowered. Perianth with a long slender tubej 

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

 Capsule l-celled. Pontederacece, 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-leaved, bract-like. Perianth colored ; limb 

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

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



***** Flowers glumacemis (dry and chaffy.} 



OBS. All the genera of this division belong to the Subclass GLUMACEALS, 

 >. 387,) and all ea 

 Order Cfperacetz, p. 



ORDER II. DIGYNIA. 2 Pistils. 



OBS. All the genera of this order are proper grasses, Graminacea, p. 418. 

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

 descriptions. 



ORDER III. TRIGYNIA. 3 Pistils. 



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

 celled, 3-valved, many-seeded. Caryophyllaeece, 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. Cistacea, p. 35. 



PROSBRPINACA. Calyx superior, the tube adhering to the triquetrous 

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

 ragacece, p. 111. 



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



