VOI,. III.] 



ACANTHUS FAMILY. 



203 



2. Ruellia ciliosa Parsh. 



Hairy Ruellia. (Fig. 3372.) 



Ruellia ciliosa Pursh, Fl. Am. Sept. 420. 1814. 

 Similar to the preceding species, but hir- 

 sute or pubescent, at least above; stem erect, 

 or ascending, rather stout, \-2% high. 

 Leaves hairy, ciliate oblong, oval, or ovate* 

 sessile or short-petioled, obtuse or subacute 

 at the apex, narrowed at the base, i/4 / ~i / 

 long; flowers clustered or solitary in the 

 axils, sometimes cleistogamous; calyx-seg- 

 ments filiform, hirsute, io // -I2 // long, about 

 %" wide; corolla blue, i^ / -2 / long, the tube 

 equalling or longer than the obconic throat 

 and nearly regular limb; capsule shorter than 

 the calyx. 



In dry soil, southern New Jersey and Pennsyl- 

 vania, to Florida, west to Michigan, Nebraska and 

 Louisiana. Perhaps includes several species. 

 June-Sept. 



Ruellia ciliosa parviflora (Nees) Britton. 

 Dipteracanlhus ciliosus va.r. parvi/loriisNees, 



Linnaea, 16: 294. 1842. 

 Ruellia ciliosa var. ambigua A. Gray, Syn. Fl. 



2: Part 1, 326. 1878. 



Glabrous or nearly so throughout, or the calyx 

 pubescent; leaves often manifestly petioled. 

 Virginia to Alabama. 



3. Ruellia pedunculata Torr. 



Stalked Ruellia. (Fig. 3373.) 



Ruellia pedunculata Torr.; A. Gray, Syn. Fl. 



2: Part 1, 326. 



1878. 



Finely pubesceut; stem erect, i-2j4 

 tall, the branches spreading. Leaves 

 ovate to oblong-lanceolate, acute or acum- 

 inate at the apex, narrowed at the base, 

 short-petioled, the larger 2 / -3 / long; pe- 

 duncles slender, spreading, i'-?,' long, 

 with 2 leaf-like bracts at the summit 

 which subtend a solitary flower, or 2 or 3 

 slender-pedicelled ones with pedicels 

 similarly bracted; calyx-segments awn- 

 like, equalling the narrow corolla-tube, or 

 shorter; corolla funnelform, i^ / -2 / long; 

 capsule about io // long, puberulent, longer 

 than the calyx. 



In dry soil, Missouri to Arkansas and 

 Louisiana. June-Sept. 



3. DIANTHERA L. Sp. PI. 27. 1753. 

 Herbs, mostly perennial, with entire or rarely dentate leaves, and small or large very ir- 

 regular flowers, variously clustered or solitary in the axils. Calyx deeply 4-5-parted, the 

 segments narrow. Corolla-tube slender, short or elongated, curved or nearly straight, the 

 limb conspicuously 2-lipped ; upper lip interior in the bud, erect or ascending, concave, entire, 

 or 2-dentate; lower lip spreading, 3-cleft. Stamens 2, inserted on the throat of the corolla, not 

 exceeding the upper lip; anther-sacs ovate or oblong, slightly divergent, not mucronate,separa- 

 ted by a rather broad connective. Ovules 2 in each cavity of the ovary; style slender; stigma 

 entire, or 2-lobed. Capsule contracted at the base into a long stipe, about 4-seeded. Seeds flat, 

 orbicular or ovate, the placentae not separating from the walls of the capsule. [Greek, double 

 anthers.] 



About( 100 species, native of tropical America, a few in tropical Asia and Africa. Besides the 

 following, 4 others occur in the southern and southwestern United States. 



Flowers capitate, the heads dense, at length oblong. i. D. Americana. 



Flowers in loose spikes. 2. D. ovata. 



