Stemodiacra] Lxxxix. scrophulariace.e. 759 



(1882). Terehinthina sessUiflora (). Kuiitze, Rev. Gen. PI. ii. 

 p. 468 (1891). 



HuiM.A. — Habit of a Lhnnujihilu : Howeis purplish. In rivulets at 

 the point of drying up and at their banks, from LopoUo to Catumba ; 

 H. and fr. Dec. i85'J and April 18G(). The seeds are obtusely angular. 

 No. 5777- Annual ; habit of a .Uiin'o/tfiyl/nni ; stems crowded, 

 sparingly branched, cylindrical, obsoletely striate, spongy-lacunose, 

 floating: leaves 5- to 11-verticilIate, the submerged ones capillary- 

 multifid, the emerged ones unlobed, mostly deeply tridentate, rosulate, 

 all more or less impressed-areolate on the surface ; calyx-teeth here 

 and there unidentate at the tip; corolla violet-whitish, the tube with 

 a yellowish tinge ; the limb with 3 lower segments and 2 upper lobes ; 

 stamens 4, didynamous, the anthers bilocular and cohering in pairs ; 

 ovary 2-celled ; style rather short : stigma bilamellate ; capsule bisulcate. 

 bilocular, rather compressed. In streams from LopoUo to Nene and 

 towards Ohai, plentiful, in company with P^tdmofjetoujanniirHx Hassk. 

 (Welwitsch No. 248) and species of Ottrlia ; fl. and voung fr. middle 

 of May 1860. No. 5776. 



2. S. ceratophylloides Hiern, sp. n. 



A herb with the habit of a C'eratophyllum, submerged or at 

 the time of flowering with the upper part of the stems emerged ; 

 stems subcylindrical, glabrous, slender, about a foot long, branched, 

 at length bare towai-ds the base, leafy above ; leaves verticillate, 

 capillary-multifid, f to 1 in. long, rather rigid in the living state ; 

 flowers axillary, sub.sessile ; calyx membranous, shortly 5-oleft ; 

 capsule (not quite ripe) ellipsoidal, sub-compressed, bisulcate, 

 somewhat emarginate at the apex, 2-celled, 2-valved, about i in. 

 long, the valves septiferous along the middle ; placentas adnate 

 on both sides to the septum, fleshy, forming a central cylindrical 

 column ; unripe seeds several, rather lai'ge, apparently horizontal, 

 ellipsoidal-ovoid, smooth, with a protruding hyaline aril at the base. 



Hull. LA. — In the deeper muddy streams between Lopollo and 

 Humpata : also in streams and in the neighbouring limpid pools in 

 Morro de Lopollo and on the Humpata plateau near Nene : in young 

 fr. April 18G0. No. 5778. 



This is the Limnop/ula referred to by Welwitsch in Journ. Linn. 

 Soc. V. p. 187 (1861). 



3. S. tenera Hiern, sp. n. 



A nearly glabrous, tender, erect herblet, 1 to 2 in. high, 

 csespitose, apparently annual ; stems numerous ; branches spread- 

 ing ; leaves opposite^ lanceolate or sublinear, scarcely acute or 

 sub-apiculate at the apex, but little narrowed at the sessile clasp- 

 ing base, entire, j^ to i in. long, spreading ; flowers axillary and 

 terminal or quasi-terminal, mostly alternate, solitary and spread- 

 ing, about ^ in. long ; peduncles i to | in. long ; bracts subulate 

 tV ^^ To ^^- ^^"& ! calyx jL to J, in. long, 5-partite, bibracteate at 

 the base, the segments subulate, erect or at length reflected : 

 corolla bilabiate, from whitish to pale blue, slightly glandular- 

 puberulous outside, somewliat pilosulous about the throat inside ; 

 stamens 4, didynamous ; anthers short, 2-celled ; capsule about 



