Vol.. III.] WATER-LEAF FAMILY. 45 



2. NEMOPHILA Xutt. Journ. Phil. Acad. 2: 179. 1S22. 



Annual diffuse pubescent slender and fragile herbs, with alternate or opposite mostly 

 pinnatifid or lobed leaves. Flowers white, blue, or variegated, solitary, peduncled, lateral 

 or terminal. Calyx deeply 5-cleft or s-parted, with a rcflexed or spreading appendage in 

 each sinus. Corolla campanulate or rotate-canipanulatc, mostly longer than the calyx, us- 

 ually with 10 small appendages within at the base, the lobes convolute in the bud. Stamens 

 included; anthers ovate or oblong. Ovary i-celled with placentae similar to those of Hydro- 

 phyllum; styles partly united; ovules 2-12 on each placenta. Capsule 2-valved. Seeds 1-4 

 in our species. [Greek, grove-loving.] 



About 10 species, natives of North America, mostly Californian. 



I. Nemophilamicrocalyx (Nutt.)F. & M. 

 Small-flowered Nemophila. (Fig. 3000.) 



Ellisia microcalyx Nutt. Trans. Am. Phil. Sec. (II. ) 5: 



191. 1833-37. 

 Nemophila nticrocalyx F. & M. Sert. Petrop. 1846. 



Stems very slender, diffuse, branched, 2'-i5' 

 long. Leaves membranous, petioled, i'-2yi' long, 

 pinnatifid or pinnately divided into 3-5 obovate 

 cuueate or oblique obtuse 2-3-dentate or -lobed, 

 approximate or confluent segments, the upper all 

 alternate, the lowest opposite; peduncles slender, 

 4"-i2" long, opposite the leaves, shorter than or 

 equalling the petioles; flowers white or blue, 1}^"- 

 2" long; appendages in the sinuses of the calyx 

 minute; calyx scarcely enlarged in fruit; ovules 2 

 on each placenta; corolla-appendages obsolete or 

 none; anthers oval; capsule about i}i" in dia- 

 meter, much longer than the calyx, 1-2-seeded. 



In woods, Virginia to Florida, west to Arkansas and 

 Texas. April-June. 



3. MACROCALYX Trew, Nov. Act. Nat. Cur. 2: 330-332. //. 7./. i. 1761. 

 [Ei.Lisi.\ L. Sp. PI. Ed. 2, 1662. 1763. Not Syst. Ed. 10. 1759.] 



Annual hirsute or pubescent branching slender herbs, with opposite or alternate, pin- 

 nately divided or i-3-piunatifid leaves, and solitary or racemose small white or bluish flow- 

 ers. Calyx 5-lobcd or 5-partcd, spreading, much enlarged in fruit, destitute of appendages 

 in the sinuses. Corolla campanulate or nearly cylindric, shorter than or slightly exceeding 

 the cal}-.x, usually with 5 minute appendages ou the tube within, its lobes convolute in the 

 bud. Stamens included; anthers oval or oblong. Ovary i-celled; styles united below; 

 ovules 2-4 on each of the placentae, which are similar to those of the two preceding genera. 

 [Greek, large calyx.] 



About 3 species, natives of North America. 



I. Macrocalyx Nyctelea (L.) Kuntze. 

 Nyctelea. (Fig. 3001.) 



Ipomoea Nyctelea L. Sp. PI. 160. 1753. 

 Polemonium (?) Nyclrlca L. Sp. PI. Ed. 2, 231. 1762. 

 Ellisia Nyctelea L. Sp. PI. Ed. 2, 1662, 1763. 

 M. Nyctelea Kuntze, Rev. Gen. PI. 434. 1891. 



Sparingly hirsute-pubescent; stem several 

 times forked, 4'-i2' high. Leaves pinnately 

 divided, petioled, 2'-4' long, ovate-oblong in 

 outline, the upper alternate, the lower opposite, 

 the segments oblong or lanceolate, dentate, en- 

 tire or lobed; peduncles slender, i-flowered, op- 

 posite the leaves; calyx in flower about 2" 

 long, about equalling the corolla, enlarging, 

 widely spreading and becoming 8"-i4" broad 

 in fruit, its lobes lanceolate or ovate-lanceolate, 

 acuminate; fruit at length pendulous; capsule 

 globose, 2"-t/' in diameter. 



In moist soil, New Jersey to Minnesota and the 

 Northwest Territorj-, south to Virginia, Nebraska 

 and Missouri. April-July. 



