428 MEXICO.— SUPPLEMENT. IRuhiacecB, 
1. Hamelia patens^ Jacq. — Hook, et Arm. supra, p. 295, {var. glabra.) — j6 foliis subtus 
molliter pubescentibus. 
Hab. /3. Realejo. — Our former specimens were quite glabrous, the present are downy and even velvety 
on the underside of the leaves. 
1 . Spermacoce tenuior, Linn. — De Cand. Prod. 4. p. 552. Hook, et Arn. supra, p. 295. 
(Tab. Nostr. XCIX. B.) 
Hab, San Bias and Tepic. — In this widely dispersed species of Spermacoce we think we have observed 
characters which will almost invalidate those of the Genus Bigelovia {Borreria. Meyer, not Acharius.) — 
The essential distinguishing mark of the Genus Bigelovia, is to have the “ Capsula matura ah apice septicide 
dehiscens dissepimento libero nullo.” (De Cand.) Such is really the case, generally speaking, with the fruit 
of the plant now before us, as showm by A. Richard, Rub. t. 14. fig. 2, S. and in our Tab. XCIX. B. fig. 
3 and 4. Hence, as it appears to us, our plant would be a Bigelovia. Schlechtendal’s character of Bigelovia 
in the Linncea (3. p. 310.) is also quite characteristic of this kind of fruit : — “ Capsula cal^e coronata, 
bilocularis, bivalvis, septicide dehiscens, dissepimento, prseter inflexos valvularum margines, nullo ; loculis 
monospermis intus demum hiantibus.”— But in otlier fruits on the same specimen we find a different mode 
of dehiscence. Not unfrequently one* or both valves separate from the fiat inner superficies of the valves or 
2. Bouvardia xylosteoides ; fruticosa, humilis ? foliis ternis late ovatis obtusis breviter petiolatis molliter 
pubescentibus subtus pubescenti-sericeis, stipulis late ovatis membranaceis pubescentibus bi-trisetigeris, floribus 
subcapitatis, capitulis 3-6-floris sessilibus, calycis tubo tomentoso, limbi laciniis elongatis spathulatis foliaceis, 
corolla tomentoso-sericea, limbi laciniis brevibus ovatis. 
Hab. On slightly elevated mountains about Mitlam( Province of Oaxaca. Andrieux, PI. Mexic. exsicc. n. 
333. — A small, apparently humble shrub, with a good deal the general aspect of some of the North American 
species of Xylosteum. Leaves, including the petioles, three-fourths of an inch long, soft and downy, silky 
beneath. The teeth of the calyx are long, spathulate and leafy, i,The corolla clothed with dense, white, silky 
tomentum • the limb of 4 short broadly ovate, spreading segments. The heads of few flowers seem to be 
quite sessile. 
3. Bouvardia? discolor; fruticosa, foliis oppositis ovatis acuminatis [breviter petiolatis supra hirsutis 
subtus albido-tomentosis in junioribus candidissimis, stipulis ovato-lanceolatis liberis (?) deciduis, corymbis 
densifloris capitatis pedunculatis terminalibus bracteatis, calycis lobis lanceolatis elongatis, corolla albido- 
tomentosa. 
Hab. Between Tehuantepec and Voca del Monte, Province of Oaxaca. Andrieux, PI. Mexic. exsicc. 
n. 334. — A doubtful species of Bouvardia. The stems are w’oody, tortuous; the older parts of the 
branches marked with the scars of fallen leaves and stipules ; younger branches very downy, almost w'oolly. 
Leaves opposite 2-3 inches long, penninerved, moderately hairy above, woolly and much paler coloured 
beneath, where in the young leaves it is pure white, Flow'ers densely crow'ded, so that the corymbs appear 
rather to be capitula ; the segments of the calyx elongated, almost leafy. The corollas about an inch long, 
canescent with white woolly down. 
* And then the character is that of Spermacoce, if w'e understand it rightly, “ Capsula calycis limbo ssepe 
obliterato coronata, bilocularis, coccis monospermis ab apice bipartibilibus, altero septo adnato clauso, altero 
septo rupto aperto.” Be Cand. — Or, according to Schlechtendal, “ Capsula calyce coronata, bilocularis, 
bivalvis, dissepimento parallelo ; loculi monospermi, alter septifrage dehiscens, alter dissepimento adnato 
clausus.” — Schkcht. in Linncea, 3. p. 355. 
