374 Dr Graham's Description qfJSeiv or Rare Plants. 



rolla (above 1 inch long) inferior, flesh-coloured, funnel-shaped, twice 

 the length of the calyx, throat inflated, limb 5-cleft, upper segments 

 reflected, lower suberect, blunt, tube very slender, slightly dilated at its 

 base to cover the germen. Stamens 5 ; filaments unequal, adhering to 

 the inside of the tube, but for a considerable way free, exserted from the 

 throat ; anthers incumbent, bilocular, oblong, lilac ; pollen of the same 

 colour, granules large. Pistil single ; germen small, oval ; style filiform, 

 reaching nearly to the anthers of the longest stamen ; stigma 3-cleft, 

 revolute. Capsule trilocular, trivalvular, loculaments monospermous, 

 valves furrowed in the middle on the outside, and opposite to this the 

 inner membrane projects to meet the wings of a central column, and 

 thus complete the dissepiments. Unripe seeds covered with mucilagi- 

 nous matter, albumen large and white, embryo central, straight, and 

 deep green. Ripe seeds oblong, triquetrous, brown, inner angle acute. 



The phenomenon regarding the action of the seed of the next species with 

 water is very beautiful here also. When the dry seed is thrown on the 

 surface of water, it for a time only partly sinks, and the vessels being 

 liberated on the lower half only, it seems to float on a cushion of cotton. 

 The pubescence every where upon the plant is glandular, and is parti- 

 cularly abundant and glutinous on the calyx. 



This is a very pretty plant, and being cultivated with the greatest ease, 

 ripening abundance of seed, it very well deserves a place among hardy 

 annuals. The seeds were collected by Mr Douglas on the NW. coast 

 of America, and were presented to us by Mr Sabine. The plants 

 flowered in the Royal Botanic Garden in July and August. 



CoUoiiiia linearis. 



C. linearis ; integerrimis, reflexis, superioribus ovato-acuminatis, utrin- 

 que pubescentibus, inferioribus lineare lanceolatis, glabriusculis ; flo- 

 ribus capitatis ; caule ramoso, pubescente. 

 CoUomia Hneaiis, iVwf/a^/, Gen. of N. American Plants, i. 12G — Bot.Reg. 

 t. 1166. 

 Descriptton — Root annual. Stem somewhat woody, branched above, pu- 

 bescent, grooved. Branches axillary, spreading, pubescent. Leaves scatter- 

 ed, sessile, entire, recurved, the lower linear-lanceolate, subglabrous, the 

 upper pubescent on both sides, ovato-acuminate, crowded near the top 

 of the stem. Flowers capitate, on very short, terminal pedicels, closely 

 surrounded by the leaves, viscid. Calyx persisting, 5-cleft, hairy, with 

 r> projecting angles, funnel-shaped ; segments 3-nerved, ovate, acute, 

 connivent green and thickened at their apices. Corolla infe"ior, funnel- 

 shaped, with a long, slender, linear, yellow tube, inflated at the base, 

 and slightly at the faux, 5-cleft, two or three times longer than the ca- 

 lyx ; segments obtuse, rose coloured, spreading. Stamens 5 ; filaments 

 slender, unequally adhering to the tube : anthers oblong, small, bilocu- 

 lar, incumbent, projecting into the faux. Germen small, oblong, deep 

 green, surrounded at its base by a paler, somewhat membranous, cup- 

 shaped disk, of 5 rounded lobes. Style filiform, equal to the tube of the 

 corolla. Stigma 3-cleft, exserted, revolute and hairy above. Capsule 

 shorter than the calyx, trilocular, trivalvular, 3-seeded, valves obcor- 

 date, externally channelled in the centre. Seeds oblong, covered with a 

 mucous coat ; albumen large and white ; embryo central, straight, dark 

 green. Dissepiments formed by projections from the middle of the valves 

 meeting the 3- winged columnar receptacle of the seeds. 

 Phlox linearis, Cavanilles, Icones, 6. p. 17- t. 527- is quoted doubtfully as a 

 synonyme for this plant. It seems, however, to be another species of 

 the genus, distinguished especially by its smaller capitulae, and more li- 

 near, less crowded, suberect leaves. 

 The seeds of this plant were received from Dr Richardson on his return 

 from his second journey to the arctic coast of America. It bears culti- 

 vation easily as an annual, but can scarcely be esteemed for beauty. 

 The chief interest it can excite is in the structure of its seed, and the 



