Hypericum.] EYPEBICINE^E. 73 



longer. Capsule transversely wrinkled; carpels 2-vittate.— Distrib. 

 Europe (Arctic), N. Africa, N. and W. Asia to the Himalaya ; introd. in U. 

 States. 



3. H. quadran'gulum, L. (in part), Fries; stem erect 4-ridged, leaves 

 ovate oblong or orbicular glands few or 0, upper ^-amplexicaul, veins and 

 reticulations pellucid, sepals glandular, styles as long as the capsules. 

 Copses and moist places, from Perth and Argyll southd. ; Ireland ; Channel 



Islands ; fi. July-Sept. — Habit of H. perforatum. Flowers 1 in. diam., 

 homogamous. Sepals erect or recurved, oblong or lanceolate, obtuse or 

 acute, sometimes minutely toothed. Petals broad, glandular. Carpels 

 multivittate.- Distrib. Europe (Arctic), N. Africa, N. and W. Asia. 

 H. quadran' gulum proper (H. du'bium, Leers) ; leaves broad, sepals oblong 

 obtuse entire. — Var. H. macula'tum, Bab. ; leaves and denticulate sepals 

 narrower. 



4. H. undulatum, Schousb. ; stem erect narrowly 4- winged, leaves 

 oblong glands copious and reticulations pellucid, sepals lanceolate glandular, 

 styles half as long as the capsule. H. bce'ticum, Boiss. 



Bogs, Devon and Cornwall ; fl. Aug.-Sept. — Glabrous. Stem 1-2 ft., slender- 

 Leaves with strong nerves beneath. Cymes lax-fld. Flowers § in. diam. 

 Sepals usually finely acuminate. Petals narrow, one half tinged red. 

 Carpels multivittate. — Distrib. Spain, Portugal, Azores. 



5. H. tetrap'terum, Fries ; stem erect narrowly 4- winged, leaves 

 broadly ovate or oblong glands and reticulations pellucid, sepals lanceolate 

 acuminate eglandular, styles shorter than the capsule. H. quadran' gtihcm, 

 L. in part and Sm. 



Moist places, from Boss southd. ; Ireland ; Channel Islands ; fl. July- Aug. — 

 Glabrous. Stem 1-2 ft. Leaves sometimes cordate. Cymes dense-fld. 

 Flowers §-§ in. diam. Sepals usually finely acuminate. Carped multivittate. 

 — Distrib. Europe, from Sweden southd., N. Africa, Syria. 



6. H. humifu'sum, L. ; stems many procumbent with 2 raised lines, 

 leaves oblong with pellucid glands, margins often revolute with black 

 glands, cymes forked, sepals unequal. 



Boadsides, commons, &c. ; ascends to 1,000 ft. in Yorks. ; Ireland ; Channel 

 Islands ; fl. July- Aug. — Perennial, glabrous. Branches 4-10 in., very many, 

 compressed, curving upwards, leafy. Leaves J— J in. Flowers J-J in. diam., 

 homogamous. — Distrib. Europe, from Denmark southd. (excl. Turkey), 

 Canaries, Azores. 



** Margins of sepals with glandular teeth. 



7. H. linarifo'lium, Vahl ; stems ascending subterete, leaves linear 

 obtuse, margins revolute, sepals lanceolate acute. 



Bocky banks, Cornwall and Devon ; Channel Islands ; fl. June-July. — Stems 

 6-15 in., many from the roots, leafy. Leaves ^-1 in. Cymes few-flowered. 

 Flowers ^ in. diam. Petals twice as long as the sepals, with black marginal 

 glands. Stamens few. Styles short. — Disteib. S.W. Europe, Canaries. — 

 A hybrid growing with this, and intermediate between it and H. humifu'sum 

 (//. decum'bens, Peterm.), occurs in Jersey. 



