OHDEH 18. ST. JOHNSWORTS. 



171 



3 L. major. Larger P. Hairy ; leaves elliptical ; pod? angular. l-2f. 

 1 L. thymifo'lia. Moary-pnbcrulent ; loaves uarrowlj' oblanceolatc; pods quite rounded, 

 largci (near 1"), polished. 10-20' high. 



3. IIELIANTHEMUM. Rock Rose. 



Petals 5 (when present), crumpled in bud, fugacious. Stamens few or 

 jinny. Stigma 3-lobed. Capsule triangular, 3-valved, opening at the top. 



* Flowers of two sort?, the later ones apetalons. Stamens 3-10.. ..Nos. 1,2. 



* Flowers all alike, 5-pctallcd. Stamens CO .. ..Nos. 3, 4. 



1 H. Canaden'se. Flowers solitary, termiral, the apctalous flowers in axillary clusters ; 



sepals ncutc; leaves lanceolate, acute, with rolled edges. In dry soil. Can. to Va. 

 Stems 8-12' high. Plant honry-pnbcsccnt. July-August. 



2 H. corymbo'sum. Flowers all terminal, crowded ; sepals obtuse, woolly. N. J. and S. 



um. Flowers snbterminiil, large; sepals acuminate. South. 

 \Vhite-tomentoue ; leaves and sepals obtuse. 3-6'. In sand. S. 



3 H. Carolinia' 



4 H. arenic'ola. 



ORDER XVIII. HYPERICACE^E. St. Johnsworts. 



Herbs or shrubs with opposite, entire^ 

 dotted leaves, and no stipules ; 



flowers mostly yellow, in cymes ; 



sepals unequal, 4-5, dotted ; 



petals 4-5, twisted in the bud, dotted, 

 and with the veins oblique; 



'stamens hypogynous, in 3 or more par- 

 cels; 



ovary superior ; style 1 ; 



fruit a capsule or berry, many-seeded. 



Analysis of the Genera. 



Petals and sepals 5 2 



Petals and sepals 4. Flowers yellow. 



fit. Peterswort. AS'CYUUH. 

 2 Fls. yellow. St.Johnswort. IIvrEii'icusr. 1 

 2 Flowers purplish. ELODE'A. 



Pit. 400. Hyporicurn perforatnm (Common St 

 JoiiriMvort): stem, leaves, and flowers, fig. 401. 

 The stamens in 3 sets surrounding the ovary with S 

 styles. Fig 402. Cross-section of the ovary 



