75 6 FLORA. 



cymose. Calyx 5-lobed, the lobes ovate-triangular, shorter than the corolla-tube; 

 corolla campanulate, white, its lobes broadly ovate, obtuse, about as long as the 

 calyx-lobes; scales narrow, heavily fringed at the summit and sparingly along the 

 sides with sk-ndcr processes; styles slender; stigmas capitate. On herbs and 

 shrubs, Md. to S. Car. and Ga. July-Sept. 



10. Cuscuta cuspidata Engelm. Cuspidate Dodder. (I. F. f. 2965.) 

 Plant yellowish; stems slender; flowers about 3 mm. long in loose panicled cymes. 

 Calyx shorter than the corolla-tube, with 2-4 similar bracts at its base; sepals 

 cuspidate, mucronate or acuminate; corolla nearly salverform, its lobes triangular- 

 lanceolate or oblong, acute or cuspidate, spreading; scales narrow, usually less 

 than one-half as long as the tube, iringed with short irregular processes; styles 

 very slender; stigmas capitate; capsule bearing the withered corolla on its summit. 

 On coarse herbs, Neb. to Mo. and Tex. July-Sept. 



n. Cuscuta compacta Juss. Compact Dodder. (I. F. f. 2966.) Plant 

 yellowish white; stems rather stout; flowers about 4 mm. long in dense clusters. 

 Calyx of 5 (rarely 4) oval crenulate obtuse sepals, subtended by 3-5 rhombic- 

 orbicular appressed serrulate bracts; corolla salverform, the tube cylindric, its 5 

 (rarely 4) lobes oblong or ovate, obtuse, spreading, much shorter than the tube, 

 the scales narrow, fringed with numerous long processes; styles slender; capsule 

 oblong, enveloped in or capped by the withering corolla. On shrubs, Ont. to N. Y., 

 Ala., Kans. and Tex. July-Sept. 



12. Cuscuta paradoxa Raf. Glomerate Dodder. (I. F. f. 2967.) Plant 

 yellowish white; stems slender; flowers sessile, 3 mm. long, exceedingly numerous 

 in dense confluent clusters covering portions of the stem of the host-plant. Calyx 

 of 5 concave oblong obtuse serrulate sepals, subtended by 8-15 narrower serrulate 

 imbricated bracts with recurved tips ; corolla-tube oblong-cylindric, its lobes 

 obtuse, persistent; scales copiously fringed at the summit and sparingly along the 

 sides w r ith long processes; styles 2-4 times as long as the ovary; capsule capped by 

 the withering corolla. On tall herbs, mainly Compositae, Ohio to S. Dak., Neb 

 and Tex. July-Sept. [C. aphylla Raf.?] 



Family 3. POLEMONIACEAE DC. 



Phlox Family. 



Herbs. Flowers perfect, clustered, regular, or nearly so. Calys 

 inferior, tubular or campanulate, 5-cleft, the lobes or teeth slightly im- 

 bricated. Corolla gamopetalous, the limb 5-parted, the lobes contorted. 

 Stamens 5, inserted on the tube of the corolla and alternate with its 

 lobes; anthers versatile, 2-celled, the sacs longitudinally dehiscent. 

 Ovary superior, mostly 3-celled ; ovules 2-00 in each cavity, amphitn> 

 pous; style filiform; stigmas 3, linear. Capsule mostly lcculicidally 

 3-valved. Seeds sometimes winged, sometimes enveloped in mucilage 

 and emitting spiral tubes when wetted; endosperm present; embryo 

 straight; cotyledons flat; radicle inferior. About 10 genera and 200 

 species, most abundant in western Am. 



Calyx distended and at length ruptured by the ripening capsule. 



Corolla salverform ; leaves opposite, entire. 1. Phlox. 

 Corolla funnelform, tubular, salverform or campanulate; leaves alternate or 



opposite. 2. Gilia, 

 Calyx not distended nor ruptured by the capsule ; leaves alternate. 

 Calyx-teeth herbaceous, not spinulose-tipped. 



Stamens declined; leaves pinnate. 3. Polemoninm. 



Stamens straight and leaves entire in our species. 4. Collomia. 



Calyx-teeth spinulose-tipped; leaves pinnatifid. 5. Naverretia. 



1. PHLOX L. 



Perennial or rarely annual, herbs, with opposite entire leaves, or some of the 

 upper ones alternate, and large flowers, in terminal cymes or cymose panicles. 

 Calyx tubular or tubular-campanulate. 5-ribbed, 5-cleft, the lobes acute or acu- 

 minate, mostly scarious-margined. Corolla salverform, the tube narrow, the limb 



