Exacum.] xcvn. GENTIANACE^. (C. B. Clarke.) 90 



5-nerved, in small specimens lanceolate and subsessile ; petiole \ in. Cymes terminal, 

 erect; pedicels mostly \-\ in.; the 1 -flowered peduncle at the bifurcation of the 

 cyme often 1-2J in. Calyx-lobes ^ in.; wing in fruit ovate or cordate, nerved. 

 Corolla-lobes % in. or more (or in small examples -^ in.). Anthers ^ in., finally de- 

 hiscing nearly to the base. Capsule | in., subglobose. Roxburgh's Ic. Ined. of his 

 E. carinatum resembles in all respects E. pedunculatum, Linn., except that the corolla- 

 * lobes are orange-yellow. As a yellow corolla is unknown in Exacum, Sprengel placed 

 the species under Scbcea. Arnott and Grisebach, assuming that Roxburgh had not 

 seen the plant alive, reduce it to E. pedunculatum. But as Roxburgh had the plant 

 in cultivation and both figured and described E. pedunculatum (under E. stdcatum), it 

 is not likely that his E. carinatum is the same thing. Roxburgh's description seems 

 almost certainly to refer to E. petiolare, Griseb., which has white corolla -lobes with 

 yellow anthers and the marked calyx-wing, &c., described by Roxburgh. It doubtless 

 extends to Ceylon, for Thwaites' E. petiolare (Clarke in Journ. Linn. Soc. xiv. 427) 

 were almost surely rightly named, though the number (C.P. 1876) attached to the 

 specimens is wrong. 



**** 



Small plant with small 5-merous flowers. 



16. E. pteranthum, Watt. Cat. 4360; leaves elliptic acuminate 3- 

 nerved often petioled, calyx-lobes winged. Griseb. in DC. Prodr. ix. 47. 



PEGU and TENASSEEIM, Wallich, Lobb, alt. 3-4000 ft., Kurz. 



Stem 4-8 in., erect, quadrangular, simple or slightly branched upwards. Leaves 

 If by | in., base narrowed ; petiole sometimes i in. Cymes terminal, few-fid., axillary 

 1-fld. peduncles sometimes added; pedicels 0- in. Calyx-lobes | in., ovate, acute; 

 wings broad-lanceolate or ovate. Corolla-lobes |- in., ovate-lanceolate. Anthers ^ in., 

 dehiscent finally nearly to the base. . Capsule in., subglobose. 



DOUBTFUL SPECIES. 



E. PUNCTATUM, Linn.f. Suppl. 124; leaves very shortly petioled 3-nerved glan- 

 dulose-punctate, corolla blue, stamens exserted yellow. Griseb. in DC. Prodr. ix. 47. 

 INDIA, Koenig. 



3. SEBJEA, 7?. Sr. 



Erect, annual herbs. Leaves small, sessile. Flowers small, yellow, in 

 terminal cymes. Calyx-lobes 4-5, keeled. Corolla-tube cylindric ; lobes 4-5 

 patent. Stamens 4-5, on the upper part of the corolla-tube, filaments short 

 linear; anther-cells oblong, opening introrsely by longitudinal slits. Ovary 

 completely 2-celled, placentae large ; style short, linear, stigma globose or 

 subspathulate. Capsule globose or ellipsoid, septicidally 2-valved. Seeds very 

 many, minute, polyhedral, testa coarsely loosely reticulated. Species 18; in 

 Africa, Madagascar, Australia, and N. Zealand. 



S. khasiana, Clarke in Journ. Linn. Soc. xiv. 428; cauline leaves - 

 in. lanceolate-linear, cyme 1-7- flowered, calyx 5-partite. Cicendia microphylla, 

 Edgeiv. in Trans. Linn. Soc. xx. 83. Erythrsea microphylla, Senth. in Gen. PL 

 ii. 811. 



N. W. HIMALAYA ; Gurwhal, alt. 5-6000 feet, Edgeworth NEPAL ; Wallich. 

 KHASIA MTS., Kollong Rock, alt. 5500 ft., Clarke. DISTRIB. Angola. 



Radical leaves at flowering time, 

 late, keeled, scarious-margined. 



, ._. , 4 .. , r __, ._ -_ oblong, scarcely apiculate, without 



glands at the base, finally straight ; stigma a flattened ellipsoid, papillose on the edge. 

 8. aurea, R. Br. (Griseb. in DC. Prodr. ix. 52), has the upper leaves broader, but the 

 plant collected by Welwitsch in Angola is identical with the Indian, except that its 

 anthers are minutely apiculate. 



H2 



