Pink Family. ]ii 



exceeding' the calyx and is the wild representative of the common garden 

 pansy. Occasionally escaped; reported by Arthur as belonging to the Iowa 

 flora, also by Gray's Manual. 



CARYOPHYLLACEAE Richmh Pink Family. 

 Annual, biennial, or perennial herbs, often with swollen joints, oppo- 

 site or verticillate entire leaves, and regular sometimes apetalous 

 flowers. Calyx persistent; sepals 4 or 5, separate or united into a calyx 

 tube. Petals 4 or 5. Stamens double the number of the sepals or fewer. 

 Styles 2-5, stigmatie along the inside. Ovary usually 1-celled. Fruit a 

 membranous capsule, dehiscing by teeth or valves or else an indehiscent 

 achene or utricle. Stipules wantiug in our species. 



* Citlyx of united sepals, tubular or ovoiil. 



Dianthus. Calyx terete, with scaly braotlets : styles 2. 



Saponaria. Calyx oblong cylindrical, obscurely nerved or 5-angled; styles 1. 



Silene. Calyx 5-toothed or 5-cleft, 10-nerved : styles 3. 



Lychnis. Calyx 5-toothed, 10-nerved; styles 5. opposite the calyx lobes. 



Agrostemma. Calyx 5 J toothed, 10-nerved; styles 5, alternate with the calyx lobes. 

 * * Calyx of distinct sepids, or united only at the base. 



Arenaria. Petals entire : styles usually 3. 



Sieluhia. Petals 2-cleft or wanting : styles usually 3. 



Ckrastium. Petals notched or S-cleft; styles 4 or 5. 



DIANTHUS L. Pink. This genus is represented in our flora by an annual, 

 with linear leaves, and small pink flowers borne in terminal clusters. Calyx 

 terete, bracted at the base, tubular, 5-toothed, many-striate. Petals 5, long- 

 clawed, dentate or crenate. Stamens 10. Styles 2. Ovary 1-celled, stipitate. 

 Capsule oblong, opening at the summit by means of 4 or 5 valves or teeth. 



D. armeria L. Dcptford P. Stem \-iy& feet high; lanceolate; leaves 

 acute or lower obtuse; bractlets lanceolate-subulate; flowers white-dotted. 

 Upland woods; June-July; infrequent; Johnson county; introduced. 



SAPONARIA L. Annual or perennial glabrous herbs, with broad leaves, 

 and conspicuous flowers. Calyx ovoid or oblong, 5-toothed, faintly nerved, 

 naked. Stamens 10. Styles 2. Capsule 1-celled, or partially 2-4-celled, 4- 

 toothed at the summit. 



S. officinalis L. Sonpirort. Bouncing Bet. Perennial; stem 1-2 feet high, 

 sparingly branched; leaves oval-lanceolate, 3-5-ribbed, short petioled; flow- 

 ers whitish or pink, in terminal corymbs; petals obcordate, clawed, append- 

 ao-ed. Waysides, waste places, old garden sites; July-August; frequent. 



S. vaccaria L. Cow-herh. Annual, stem 1-3 feet high, branched above; 

 leaves lanceolate or ovate-lanceolate, acute, connate; flowers pale red, in 

 loose corvmbed cymes; calyx 5-ribbed, in fruit inflated and wing-angled; 

 petals crenulate, not appendaged. Fields and waste places; June-August; 

 infrequent; Winneshiek, Scott, Henry, Johnson, Story, and Lyon counties. 



SILENE L. Annual or perennial herbs with opposite or verticillate leaves 

 and solitary or cymose flowers. Calyx 5-toothed or 5-cleft, 10-many-nerved, 

 bractless. Petals 5, clawed. Stamens 10. Styles usually 3. Pod 1-celled, 

 sometimes 3-celled below, opening above by 3 or 6 teeth. 

 * Perennials; calyx Inflated. 



S. stellata (L.) Ait. Starry campion. Stem 2-4 feet high; leaves mostly in 

 4's a few opposite, ovate-lanceolate, acuminate, margins ciliate; flowers in 

 panieled cymes; calyx campanulate, inflated, teeth triangular; petals white, 

 fringed. Woods; June-August; common. 



S. nivea Otth. Stem 1-3 feet high, rather weak, erect or ascending, sim- 



