150 DROSERACE^E. [Drosera. 



often lax ; embryo axile, straight. — Distrib. Sandy or marshy places ; 

 most common in temp. Australia ; genera 6 ; species 110. — Affinities. 

 Close to Saxifrageoz. — Properties. Yield a deep red-purple dye. For 

 their carnivorous properties, see Darwin On Insectivorous Plants. 



l. DROSERA, L. Sundew. 



Slender glandular herbs. Leaves alternate or rosulate ; stipules scarious, 

 adnate to the petiole, or 0. Flowers in scorpioid revolute cymes, rarely 

 solitary. Sepals and petals 4-6 or 8. Stamens as many, hypogynous or 

 perigynous. Ovary free, ovoid or globose, 1-celled ; styles 2-5, distinct 

 or connate below ; ovules in many series, on 2-5 parietal placentas. 

 Capsule oblong, 2-5-valved. Seeds minute, testa usually lax ; embryo 

 large or small. — Distrib. Of the Order ; species 100. — Etym. Spoaepos, 

 from the dew-like glands. 



1. D. rotundifo'lia, L. ; leaves horizontal orbicular or broadly obovate, 

 petiole hairy, testa loose reticulate. 



Spongy bogs and heaths, N. to Shetland ; ascends to 2,300 ft. in the Highlands ; 

 Ireland ; Channel Islands ; fl. July-Aug. — Rootstock slender. Stem very 

 short. Leaves ^— \ in. diam., rosulate, margin glandular, nearly glabrous 

 above ; petiole I-I5 in., gradually dilated at the sheathing base. Scapes 3- 

 6 in., in the centre of the rosette ; bracts subulate ; pedicels short. 

 Flowers \ in. diam., many, in 2 series, white, usually 6-merous, homo- 

 gamous. Petals a little longer than the sepals. Styles 2-fid, incurved, 

 segments clavate. Capsule acute, exceeding the sepals. Seeds elongate. — 

 Distrib. Europe (Arctic), N. and W. Asia, N. America. 



2. D. intermedia, Eayne ; leaves erect obovate or oblong-spathulate, 

 petiole glabrous, testa close granulate. D. longifo'lia, L. in part. 



Bogs and moist heaths, from Caithness to Sussex and Cornwall ; local in 

 Scotland ; Ireland ; fl. July— Aug. — Stem short, leafy. Leaves gradually con- 

 tracted into the petiole, together 1-2 in. Scapes 2-4 in., from the base of 

 the rosette, curved at the base. Flowers much as in D. rotmidifo'lia, 

 usually 5-8-merous. Capsule pyriform, equalling the sepals. Seeds ovoid. 

 — Distrib. Europe (Arctic), W. Asia, America from Canada to Brazil. 



3. D. ang'lica, Buds. ; leaves suberect linear-spathulate, petiole 

 glabrous, testa loosely reticulate. D. longifolia, L. in part. 



Wet moors, from Orkney to Devon, Dorset, and Suffolk ; ascends to 1,700 ft. 

 in the Highlands ; rare in S. England ; Ireland ; fl. July-Aug. — Tery 

 similar to L>. interme'dia, but larger. Leaves £ in. broad ; petiole 2-4 in. 

 Scapes 4-8 in., from the centre of the rosette. Flowers % in. diam., 5-8- 

 merous. Capsule obovoid, longer than the sepals. — Distrib. Europe, N. 

 Asia, America. — D. obova'ta, Mert. and Koch, with broader leaves, stylos 

 often notched, capsule half as long as the sepals, seeds imperfect, is 

 probably a hybrid with D. rotundifo'lia. — Scotch moors. 



