462 | ONAGRARIEA. 
6. HAUYA. 
Hauya, Moe. et Sessé in DC. Mém. Onagr. p. 2; Benth. et Hook. Gen. Plant.i. p. 791. (Char. 
-emend.) 
Calycis tubus cylindricus, longe supra ovarium in limbum profunde 4-lobum divisus, lobis per 
anthesin reflexis. Petala 4, summo tubo inserta, sessilia. Stamina 8, plus minusve exserta, 
filamentis filiformibus summo tubo insertis, antheris filamentis fere zequilongis, medio-fixis, 
oscillatoriis, apice aristatis, reticulatis, (in siccis) demum tortis. Ovarium 4-loculare; stylus 
elongatus, stigmate crasso; ovula numerosissima, angulo interiori loculorum biseriatim affixa, 
adscendentia. Capsula lineari-oblonga vel ellipsoidea, loculicide 4-vaivis, valvis medio septi- 
feris. Semina numerosissima, biseriata, adscendentia, imbricata, testa coriacea, superne in 
alam auriculatam producta; cotyledones oblonge, compress, plane; radicula brevissima.— 
Frutices vel arbores. Folia alterna, petiolata, simplicia, integerrima. Flores magni, axillares, 
solitarii, sessiles, ex albo rosei. 
The genus is restricted to Mexico and Guatemala. 
1. Hauya barcenz, Hemsley, Diag. Pl. Nov. pars 1,p.13. (Tab. XXIX. fig. 2.) 
Glabrescens, foliis ovato-rotundatis longe petiolatis, venis lateralibus subtus prominentibus, calycis 
lobis tubo zequilongis, petalis ellipticis, stigmate clavato, capsulis bipollicaribus. 
Arbor 40-pedalis, ramis junioribus puberulis. Folia alterna, puberula, demum glabra, subcoriacea, 
longe graciliterque petiolata, lamina ovato-rotundata, 2-21 poll. longa, petiolo ad pollicari ; 
stipule minute, decidue. Flores brevissime pedicellati, ad 24 poll. longi; calyx fere coriaceus, 
lobis tubo fere equilongis ; petala ovato-rotundata; stigma clavatum. Capsula bipollicaris, 
valvis dorso planis. 
Soutn Mexico, Huauapan, Oaxaca (Andrieux, 391). Hb. Kew. 
Whether the characters upon which this species is founded are constant, it is impos- 
sible to say with the limited material before us; but it is probable that this may 
eventually prove to be no more than an extreme form of H. elegans. It is named in 
honour of Professor Mariano Barcena, of the National Museum of Mexico, who has 
recently published a ‘ Noticia Cientifica de una parte del Estado de Hidalgo.’ In this 
little work he enumerates the characteristic plants of the district under consideration, and 
among other things describes and figures a Hauya, which he thinks may be distinct from 
the original 4. elegans. His figure is not drawn with botanical precision, and cannot 
be said to represent exactly either of the forms here admitted to the rank of species ; 
nor does his description agree in all particulars with either this or H. elegans. 
2. Hauya cornuta, Hemsley, Diag. Pl. Nov. pars 1, p. 13. (Tab. XXTX. 
fig. 3.) | 
Foliis oblongo-lanceolatis ellipticisve abrupte breviterque acuminatis subtus cano-tomentosis, calycis 
lobis tubo fere dimidio brevioribus apice cornutis, capsulis vix pollicaribus, valvis dorso distincte 
carinatis. | 
Frutex vel arbor parva, ramis teretibus, junioribus puberulis. ola alterna, petiolata, vix coriacea, 
oblongo-lanceolata vel elliptica, 2~3-pollicaria, integerrima, breviter acuminata, supra puberula, 
subtus cano-tomentosa, petiolo tereti, gracili, 3-6 lin. longo; stipulea minute, subulate, mox 
decidue. Flores graciles, 2-24 poll. longi, subvelutini; calycis lobi reflexi, apice dorso cor- 
