Ditaxis. 59 



ß. Ramuli florigeri abbreviati, 3 — 7 cm longi . . . .21.7). breviramea. 

 B. Indumentum e pilis simplicibus, mollibus, brevibus compo- 

 situm, minore ex parte malpighiaceum 22. D. adenophora. 



8. D. guatemalensis (Müll. Arg.) Pax et K. Hoflm. — Argyrothamnia guatemalensis 

 Müll. Arg. in Linnaea XXXIV. (1865) 145; in DG. Prodr. XV. 2 (1866) 736. — 

 Fruticulus y 2 — 3 /4 m altus; rami adscendentes, subvirgati, angulosi, juniores dense 

 subsericeo-adpresso-pubescentes, canescentes, pallide virides, tarde glabrescentes. Folia 

 canescenti-viridia, haud purpurascentia, praesertim juvenilia subtus prominenter costata; 

 petiolus 1 — 3 mm longus; limbus \ i / 2 — 4y 2 cm longus, 5 — 18 mm latus, ovatus vel 

 elliptico-ovatus vel lanceolatus vel suborbiculari-ovatus, in eodem specimine saepe am- 

 bitu ludens, breviter acutatus, basi acutus vel obtusus vel rotundatus, membranacens, 

 serrulatus, primo dense pilis malpighiaceis vestitus, demum supra viridis, parcius vestilus, 

 subtus canescens, basi 3-nervius; costae subtus prominentes; stipulae 1 mm longae, 

 angustae. Racemi abbreviati; flores subglomerato-congesti; rhachis 1 — 2 mm longa, 

 pubescens, basi florem Q unicum, deinde q? 3 — 8 gerens; bracteae 3 — 4 mm longae, 

 ovato-lanceolatae, acuminatae, vestitae; flores utriusque sexus subsessiles. Sepala (J* 

 5, lanceolata, acuminata, extus et intus pilosa, 4 mm longa; petala rhombeo-ovata, 

 acuta, calycem aequantia, inferne nervo medio incrassato percursa, extus pilosa, intus 

 glabra vel subglabra, columnae modice adnata; disci glandulae distinctae, glabrae, 

 columnae adnatae, margine liberae; stamina 1 0, biseriata; verticilli approximati; stami- 

 nodia 3, brevia, glabra. Sepala Q 5, 6 — 7 mm longa, lineari-lanceolata, acuminata, 

 post anthesin vix accrescentia, cum petalis utraque facie vestita; petala 4 mm longa, 

 angusle lanceolata, acuminata, calyce breviora; disci glandulae liberae, glabrae; ovarium 

 densissime pilis malpighiaceis vestitum; styli fere ad medium connati, pilosi, parte 

 libera ad medium fere bifidi; lobi dilatati, crenulati. Capsula 4 mm lata, depressa, 

 dense pilosa. Semina globosa, reticulata, 2 — 2*/ 2 mm diametientia. 



Tropisches Centralamerika: Mexiko, Puebla, Tehuacan (Endlich n. 181l!, 

 1 8 IIa!, Liebmann, Pringle n. 6763!, 7035!); Guerrero, Acapulco (Palm er n. Hl); 

 Guatemala (Friedrichsthal). — Strauchsteppen oder Steppenwälder auf Kalkbergen, 

 1600 — 1700 m. 



9. D. tinctoria (Millsp.) Pax et K. Hoffm. — Argithamnia tinctoria Millspaugh 

 in Field Columb. Museum I. (189 6) 302, t. 14. — Fruticulus 1 y 3 m altus; caulis 

 lignosus, inferne glabratus, superne ramosus et pilis adpressis vestitus. Petiolus 3 — 

 5 mm longus, limbus 4 — 6 cm longus, 1 ] / 2 — 2 V2 cnl latus, ovato-lanceolatus, acuminatus, 

 basi acutus, subinteger vel parce et minute glanduliformi-denticulatus, basi trinervius, 

 evolutus supra glabratus, subtus dense pilosus; stipulae apiculatae, 3 — 4 mm longae. 

 Racemi abbreviati, densiflori, monoici, foliis 2- vel 3-plo breviores. Sepala QJ* ovata, acuta, 

 pilosa; petala suborbicularia, pilosa, sepalis breviora; disci glandulae spathulatae, superne 

 liberae, glabrae, parvae; filamenta pilosa. Sepala Q ovato-lanceolata, acuta, pilosa, 

 carinata-; petala rhombeo-ovata, acuminata, glabra, inferne nervo medio incrassata; disci 

 glandulae liberae, subpeltatae, conduplicatae, parvae; styli bifidi, superne dilatati. Cap- 

 sula dense pilosa. Semina reticulata, rosea. 



Tropisches Centralamerika: Yucatan, verbreitet um Xcholac (Gaurn er 

 n. 426). — Subäquatoriale andine Provinz: Nicaragua (Wright). 



Nota. Species, a nobis non visa, in affinitatem D. guatemalensis pcrtinere vidclur. 



10. D. manzanilloana Pax et K. Hoffm. n. spec. — Argithamnia manzanilloana 

 Rose in Sched. — Fruticulus videtur; rami graciles, angulosi, adpresse pilosi, non 

 glabrescentes. Petiolus 2 mm longus; limbus 4 — 5 cm longus, 13 — 19 mm latus, 

 ovatus, acuminatus, basi acutus, subinteger vel vix denticulatus, basi trinervius, mem- 

 branaceus, pallide viridis, pilis malpighiaceis, crispulis pubescens; costae subtus pro- 

 minentes; stipulae parvae, vix 1 mm longae. Racemi abbreviati; flores subglomerato- 

 congesti; rhachis 5 — 6 mm longa, basi florem Q 1 et ^f 4 gerens; bracteae q? et 

 Q orbiculari-triangulares, acutae, vestitae; flores utriusque sexus subsessiles. Sepala 



