Thouinia. 437 



pubescentia, subcoriacea; thyrsi axillares (sp. 



cubensis) 2. Th. elliptica. 



bb. Thyrsi abbreviati, eramosi, erecti (in Th. inaequali 

 ignoti). 



a. Folia anguste oblonga vel sublinearia, spinulose 

 repando-dentata, glabra, nervis remotiusculis pa- 

 tulis, crebre punctata, epidermide mucigera (sp. 



cubensis) 3. Th. patentinerois. 



ß. Foliola e basi ovata sublinearia, spinulose serrulata, 

 subtus cano-puberula, nervis crebris approximatis 

 patentibus, impunctata, epidermide mucigera (sp. 



haitiensis) 4. Th. multinervis. 



y. Foliola linearia, inaequilonga, intermedia longis- 

 sima, lateralia perbrevia, spinulose repando-dentata, 

 glabra, utrinque viridia, nervis remotiusculis, im- 

 punctata, epidermide mucigera (sp. haitiensis) . 5. Th. inaequalis. 

 b. Folia 1-foliolata (sp. haitienses). 

 aa. Thyrsi eramosi. 



a. Thyrsi elongati, racemiformes; folia subovato- 

 lanceolata, inaequaliter repando-dentata, mem- 



branacea, epidermide mucigera 6. Th. racemosa. 



ß. Thyrsi abbreviati, spiciformes; folia ovato-lanceo- 

 lata, latiuscula, subintegerrima vel breviter denti- 



culata, chartacea, epidermide mucigera 1. Th. spicata. 



bb. Thyrsi saepius ramosi, mediocres, in inflorescentiam 

 scopiformem congesti; folia e basi ovata sublinearia, 



epidermide non mucigera 8. Th. scoparia. 



B. Fructus cocci nervis prominentibus striati (incogniti in Th. 

 paucidentata, rigidissima et domingensi). 

 a. Folia 3-foliolata (cfr. infra Th. portoricensis). 



aa. Thyrsi sat longi, ramosi, paniculiformes, apice nutan- 

 tes; foliola obscure minutim punctata, epidermide 

 mucigera. 



ct. Thyrsi densiflori; foliola elliptica, utrinque sub- 

 acuta, crebre serrato-dentata, vix conspicue punc- 

 tata, subtus villosa, lateralia sessilia (sp. mexicana) 9. Th. villosa. 

 ß. Thyrsi laxiflori, flaccidi. 



aa. Foliola lanceolata, remotiuscule argute serrata, 

 vix conspicue punctata, subtus pubescentia, 



lateralia sessilia (sp. mexicana) 10. Th. serrata. 



ßß. Foliola ovato-lanceolata, acuminata, leviter 

 serrata, sat conspicue punctata, subglabra, 

 omnia petiolulata (sp. mexicano-guatemalensis) 11. Th. acuminata. 

 bb. Thyrsi abbreviati, eramosi, rarius 1 — 2-ramosi, cras- 

 siusculi, stricti, juniores amentiformes (rarius longiores, 

 flexuosi in Th. striata et velutina). 

 a. Foliola glabra, epidermide mucigera. 



aa. Folia lanceolata, paucidentata, subimpunctata 



(sp. mexicana) 12. Th. paucidentata. 



ßß. Foliola ovata, subintegerrima, grossiuscule 



punctata (sp. cubensis) 13. Th. punctata. 



ß. Foliola subtus in venis pube laxiore densioreve 

 vestita, conspicue punctata, epidermide mucigera. 



