RUBIACE.E. CXCIV. MITRACARPUM. CXCV. CRUCKSHANKSIA. CXCVI. STAELIA. 



631 



front, and marked by 4 rays. Perhaps the same as M. sca,- 

 brum, Zuccar. in Roem. et Schultes, syst. 3. p. 210. which was 

 found about Fort Louis. 



Senegal Mitracarpum. Shrub. 



* * Annual plants. 



10 M. TORRESIA'NUM (Cham, et Schlecht. in Linnaea. 3. p. 

 360. t. 3. f. 2.) stem erect, simple, somewhat tetragonal, rather 

 pilose on the angles ; leaves elliptic-lanceolate, attenuated at the 

 base, membranous, rather downy on both surfaces ; stiptilas 

 membranous, with white villous bristles ; flowers disposed in 

 capitate whorles, the terminal one usually formed of 2 combined 

 heads, and girded by 4 leaves. O- F. Native of Guajan and 

 Marianne Islands. Flowers white. 



Torres's Mitracarpum. PI. 2| foot. 



11 M. viLi,6suM (Cham, et Schlecht. in Linnaea. 3. p. 363.) 

 stem erectish, sparingly branched, slightly tetragonal, villous ; 

 leaves oval-lanceolate, downy ; stipulas membranous, cleft into 

 many bristles ; heads of flowers axillary, verticillate, and ter- 

 minal, the latter girded by 4 leaves ; anthers inclosed. () F. 

 Native of Jamaica. Spermacoce hirta, Jacq. icon. rar. t. 308. 

 and probably of Lin. Spermacoce villosa, Swartz, obs. p. 45. 

 Corolla white. Anthers yellow. Seeds pale, somewhat 

 tubercular on the back, and marked by a cruciate furrow in 

 front. 



Villous Mitracarpum. Fl. June, July. Clt. 1816. PL | to 

 1 foot. 



12 M. HIRTUM (D. C. prod. 4. p. 572.) stem erect, branched, 

 scabrous, tetragonal ; leaves ovate-lanceolate, clothed with hairy 

 pubescence ; stipulas membranous, with many bristles : axillary 

 heads of flowers verticillate ; terminal ones girded by 4 leaves ; 

 anthers exserted. Q. F. Native of Jamaica, in dry, grassy 

 places ; and of the Society Islands. Spermacoce hirta, Swartz, 

 obs. p. 45. Very like M. villosa, but differs in being more 

 branched, in the anthers being exserted and blue, and in the 

 seeds being smaller, blacker, and concave in front, not with 4 

 rays. 



Hairy Mitracarpum. Fl. June, July. Clt. 1818. PI. | to 

 1 foot. 



13 M. FISCHE'RI (Cham, et Schlecht. 3. p. 363.) stem erect, 

 hairy, tetragonal ; leaves oblong, attenuated at the base, acute, 

 downy from very short hairs ; stipulas ciliated ; flowers densely 

 capitate, terminal ; teeth of calyx 4, lanceolate, acute, a little 

 shorter than the corolla. O- F. Native of Jamaica. Sperma- 

 coce Fischeri, Link. enum. 1. p. 132. Spermacoce adscendens. 

 Fisch. ined. Corollas white. Habit of Spermacoce aspera, 

 Aubl. 



Fischer's Mitracarpum. Fl. May, June. Clt. 1821. PI. 

 1 foot. 



14 M. sTYLbsuM (Cham, et Schlecht. in Linnaea. 3. p. 363.) 

 stem decumbent, terete, glabrous ; leaves oblong-lanceolate, 

 attenuated at the base ; bristles of stipulas long ; flowers dis- 

 posed in dense whorles ; the two large teeth of the calyx are 

 subulate at the apex ; style exserted. O- F. Native of Ma- 

 nilla. Spermacbce stylosa, Link. enum. 1. p. 132. Sperma- 

 c6ce crassifolia, Hortul. Capsule membranous, glabrous. Co- 

 rollas white. Seed orbicular, with a mark like the letter x 

 engraven on the front, somewhat 4-lobed, of a pale, dirty 

 colour. 



Long-styled Mitracarpum. Fl. May, June. Clt. 1819. PI. 

 1 foot. 



2. Calyx with 4 nearly equal acutish teeth. 



15 M. NEGIE'CTUM (D. C. prod. 4. p. 573.) plant glabrous, di- 

 chotomous ; leaves oblong-linear, acute, almost veinless ; bristles 

 of stipulas 3, stiff, longer than the sheath ; heads of flowers 



terminal, 3 times shorter than the bracteas ; calyx glabrous, with 

 4, hardly acute teeth, which are a little shorter than the corolla. 

 Native of Brazil, where it was collected by Pohl. Spermacoce 

 neglecta, Schott ex Pohl, in litt. Heads of flowers 5 lines in 

 diameter. Floral leaves about an inch long, and 2 lines broad. 

 Neglected Mitracarpum. PI. ? 



f- Species not sufficiently known. 



16 M. SQUARRO'SUM (Cham, et Schlecht. in Linnsea. 3. p. 

 363.) Native of Cuba, on rocks about Havannah. Spermacoce 

 squarrosa, Poepp. Nearly allied to M. Sellowianum, but differs 

 in its smoothness. 



Squarrose Mitracarpum. PL 



Cult. See Borreria, p. 618. for culture and propagation. 



CXCV. CRUCKSHA'NKSIA (named after Mr. Cruck- 

 shanks, the original discoverer of the plant, and a particular 

 friend of both Hooker and Arnott). Hook, et Arn. in bot. 

 misc. 3. p. 361. but not of Hook, in bot. misc. vol. 2. t. 90. 



LIN. SYST. Pentundria, Monogy'nia. Calyx with a globose 

 subdidymous tube, and a 5-toothed limb ; teeth usually furnished 

 with an accessory small subulate tooth on each 'side ; one or two 

 of the teeth are usually expanded into large reticulated peduncu- 

 late roundish membranous wings. Corolla salver-shaped, with 

 an elongated tube, a 5-cleft spreading limb, and a glabrous 

 throat. Stamens 5, exserted, inserted in the mouth of the 

 corolla. Filaments club-shaped, acute ; anthers linear-oblong, 

 fixed by the base. Style filiform, a little longer than the tube 

 of the corolla ; stigma bifid, pilose : the divisions linear and 

 acute. Capsule membranous, globose, subdidymous, crowned 

 by the more or less widened calycine segments, 2-celled, 4- 

 valved ; cells 2-seeded ; valves ovate, very concave, boat- 

 shaped, 1 -nerved in the middle, separable from the thin mem- 

 branous white dissepiment. Seeds large, obovate, black, tu- 

 bercled, very deeply furrowed on the inside at the hylum. 

 Albumen horny. Embryo central, very much curved ; cotyle- 

 dons flat ; radicle nearly terete, inferior, elongated. The whole 

 plant is more or less pubescent. Root perennial, dividing into 

 many stems at the neck. Stems herbaceous, terete, ascending, 

 flexuous, branched. Leaves obovate-lanceolate, acute, tapering 

 into the petiole, stipulate ; stipulas interpetiolar, broad-subulate, 

 free, or joined more or less. Bracteas involucra-formed, simple 

 or tripartite, furnished with small subulately toothed stipulas at 

 the base on both sides. Peduncles terminal and axillary. 

 Flowers disposed into a rather large depressed cyme : having 

 the corolla and calycine wings yellow. 



1 C. HYME'NODON (Hook, et Arn. 1. c.) Native of Chili, 

 about Coquimbo. There are varieties with hoary or less pubes- 

 cent leaves. This most extraordinary plant has little of the 

 general appearance of any of the Rubiaceee, although in its most 

 striking peculiarities, the dilatation of some of the calycine teeth 

 into disproportionably large orbicular, or somewhat reniform 

 petiolate wings, it has an affinity with Mussce'nda. Its place in 

 the order is, however, near Spermacbce and Mitracarpum. 



Membrane-toothed Cruckshanksia. PI. 



Cult. See Richardsbnia, p. 628, for culture and propagation. 



CXCVI. STAE'LIA (this genus is dedicated to the illus- 

 trious Baron Augustus de Stael Holstein). Cham, et Schlecht. S. 

 p. 364. t. 3. f. 3. D. C. prod. 4. p. 573. 



LIN. SYST. Tetrdndria, Monogy'nia. Calyx with an" ovate 

 tube, and only 2 subulate teeth, with hardly any accessory ones. 

 Corolla funnel-shaped, with a slender tube, and a 4-lobed acute 

 limb. Stamens 4, exserted. Stigma 2-lobed. Capsule mem- 

 branous, 2-celled, 2-valved, with an entire permanent dissepi- 

 ment; valves concave, crowned each by a calycine tooth, cut at the 



