566 I, Urban. 
Ayuda macho ó amarilla Cub. ex Rich., Ayüa v. Ayuda Cub. ex 
Maza; Prickly yellow wood or Yellow Hercules Jam. ex P. Br. 
Johnson et Macf.; Espino v. Espino rubial Portor. ex Krug et Sint. ; 
Genizo ibid. ex Bertero et Sint.; White Prickle in St. Thomas ex Egg. ; 
White prickle wood in Montserrat ex Ryan; Lepineux in Désirade 
ex Duss; Bois épineux Guad, ex Duch. 
Arbor parva v. grandis 5—20 m et ultra alta, trunco aculeato, aculeis 3—6 mm 
longis a latere compressis massae suberosae cr. 45 mm longae, cr. 20 mm crassae, 
10—1412 mm latae, e basi oblonga v. anguste rhombea prodeunti insidentibus. Ramu li 
vetustiores crassi, in sicco irregulariter plicato-striali, brunnescentes v. cinerascentes 
el cicatricibus foliorum delapsorum obcordatis notati, inermes v. aculeis crebris v. 
parcis sparsis brevibus 2—4 mm longis e strato ovali prodeuntibus brunneis rectis sub- 
rectisve, inferne a latere parum compressis armati, hornotini praesertim superne bre- 
viter pubescentes v. ad apicem tomentosuli. Folia 3—7 cm longe petiolata, petiolo 
supra plano v. vix sulcato, rhachi supra sulcata v. canaliculata, inermi v. aculeis par- 
cis sparsis subrectis inferne a latere compressis subtus armata, breviter pubescente v. 
dorso glabra, plerumque imparipinnata; foliola valde variabilia, in ramis floriferis ple- 
rumque 9—45, in junioribus usque 33, lateralia opposita v. alterna (saepe in eodem 
ramo), in ramis floriferis plerumque lanceolato-oblonga v. oblonga v. ovali-oblonga, 
raro obovata v. oblonzo-lanceolata, apice breviter v. brevissime acuminata v. obtusa, 
raro rotundata, basi inaequilatera, latere superiore acuto, inferiore obtusiore v. rotun- 
dato et magis descendente, (3,5) 6—10 cm longa, (1,5) 2—4 cm lata, 21/5—4-plo longiora 
quam latiora, margine plano v. recurvato plerumque integra, raro basi excepta crenu- 
lata, sub anthesi renovata membranacea, sub fructu membranaceo-chartacea v. charta- 
cea, supra plus minus nitida glabra v. brevissime pilosula, nervo medio breviter pu- 
bescente, subtus pallidiora opaca, breviter pilosa v. glabrescentia, nervo medio subtus 
plerumque inermi, raro aculeis 1—3 obsito, nervis lateralibus supra tenuiter v. vix pro- 
minulis v. leviter impressis, utrinque manifeste v. obsolete reticulato-anastomosantibus, 
punctis pellucidis in facie parcis v. subparcis, in ramis sterilibus (plantae junioris) 
oblongo-lanceolata usque lanceolato-linearia, mediocriter v. longe acuminata usque 
13 em longa, usque 7-plo longiora quam latiora. Inflorescentiae terminales et ex 
axillis foliorum superiorum laterales, panniculas plus minus evolutas usque 42 cm longas 
formantes, interdum tantum laterales, ramis et ramulis breviter v. brevissime pilosis 
v. tomentosulis, non suberosis, ramulis spicas e floribus 1—paucis glomeratis compositas 
formantibus; bracteae inferiores oblongae v. ovatae tomentosulae deciduae, bracteolae 
supremae minutae; pedicelli subnulli usque 4 mm, fructiferi usque 2,5 mm longi. Flores 
albi masculi: Sepala basi brevissime inter sese connata v. hinc illinc sublibera, 
triangularia v. triangulari-ovata obtusa v. acuta brevissime pilosula 0,4—0,6 mm longa, 
0,3—0,4 mm lata. Petala in aestivatione leviter cochleato-imbricata, sub anthesi pa- 
tentia, ovata v. ovalo-elliptica, apice obtusa 1—1,3 mm lata, membranacea, dorso non 
glanduloso-incrassata, glabra v. dorso minutissime pilosula, calyce 3—4-plo longiora. 
Filamenta petalis dimidio longiora; antherae breviter ovatae v. orbiculari-ovatae, 
dorso ad v. sub medio affixae. Gynaeceu m satis evolutum petala aequans v. iis dimi- 
dio brevius, anguste ovatum, inferne integrum (gynophorum), supra medium 3—5-car- 
pidiatum, carpidiis inferne connatis dein liberis lanceolatis cassis in stylos lineares erectos 
breves non stigmalosos atlenuatis. Flores feminei: Petala erecta ovario vix breviori 
accumbentia satis longe persistentia. Staminodia minutissima glanduliformia v. ob- 
soleta. Gynaeceum totum globoso-obovatum v. subpiriforme apice truncatum ; gyno- 
phorum extrinsecus visum specie nullum, re vera (longitudinaliter sectum) carpidia 
genuina longitudine fere aequans, profunde sed anguste 5-sulcatum; carpidia apice sub- 
