Serjania. 159 



minores, elliptico-annulares. Stamina basi laxe pilosiuscula, superne glabra. Gerriten 

 pyriformi-trigonum, 2 mm longum, 1,5 mm latum, glandulis minutis, nee non in angulis 

 pilis brevibus adspersum; Stylus germen subaequans, apice breviter trifidus. Fructus 

 3,8 cm longus (»IV2 pollicem« Torrey), ad loculos longitudine fere fruetum dimidium 

 aequantes 2 cm, inferne 1,3 cm latus. 



In Mexico septentrionali et in Texas meridionali: Bigelow (Mountains 

 of Santa Rosa, Coahuila; cf. Torrey 1. c; speeimen non vidi); Mexican Boundary 

 Survey n. 183! (collected under the direction of Major W. H. Emory, Commissioner, 

 chiefly in the Valley of the Rio Grande, below Donana by C. C. Parry, J. M. Bigelow, 

 Ch. Wright and A. Schott; near Rio San Pedro at the painted caves, Schott; Hb. 

 Hook., sine nomine); C. Wright n. 98! (collected in expedition from Western Texas 

 to El Paso, New Mexico, May — Octob. 1849; cf. Asa Gray 1. c; Hb. Mus. Brit., Hb. 

 Benth.); C. G. Parry, Fl. Mexic. n. 123 1 / 2 ! (Texas, en route from San Luis Potosi to 

 San Antonio, m. Aug. 1878, flor. ; Hb. Kew.). 



118. S. rutaefolia Radlk. in Rose, Report PI. Palmer in Contrib. U. S.Nation. Herb. 

 1. 9. (1895) 316, cf. ibid. 297, 299; P. G. Standley, Trees and Shrubs of Mexico in Contr. 

 Li. S. Nat. Herb. XXIII. 3. (1923) 697. — Scandens, suffruticosa, cano-pubescens; 

 rami teretes, leviter 8-striati, pube brevi cana crispula induti, cortice viridi; corpus 

 lignosum simplex, teretiusculum; folia impari-pinnata, tri — quadrijuga, pinnis infimis 

 nunc ipsis trijugis, jugo infimo utrinque ternato, vel biternatis, vel 5-foliolato-pinnatis, 

 proximis 5-foliolato-pinnatis vel trifoliolatis, summis simplieibus (folio 1 inde foliola 19 

 ad 41 exhibente); foliola parvula, superiora subrhombea vel oblonga vel obovata, in- 

 feriora ovata vel suborbicularia, fere omnia obtusa, immo retusa, mucronulo ornata, 

 in petiolulos attenuata vel subsessilia, integerrima vel parce inciso-dentata, pilis brevibus 

 crispulis glandulisque microscopicis utrinque obsita, membranacea, triste viridia, 

 punetis pellucidis parvis lineolisque notata, epidermide mucigera (paginae superioris 

 quoque stomatibus instrueta) ; petiolus communis teretiusculus, striatus, petioli partiales 

 superiores rhacheumque segmenta superiora marginata; thyrsi solitarii, folia subduplo 

 superantes, rhachi quam pedunculus communis subduplo longiore cincinnisque stipitatis 

 subverticillatim approximatis pube cana crispula densa indutis; flores mediocres,longius 

 pedicellati; sepala omnia pube cana crispa densa (intus quoque) induta; tori glandulae 

 superiores ovatae, inferiores conformes, vix minores; stamina fere tota breviter hirsuta; 

 germen (auetum) ex obovato euneatum, pube brevi cana ad loculos densissima indutum 

 nee non intus dense albidö-pubescens, stylo glaberrimo; fructus — (non suppetebat). 



Rami thyrsigeri diametro 2 mm. Folia inferiora 12 cm longa, totidem lata; foliola 

 terminalia 2 — 2,5 cm longa, 0,9 — 1 cm lata, lateralia inferiora 1 cm longa et lata; 

 petiolus communis 2,5 — 3,5 cm longus, partiales paullo breviores, rhacheum segmenta 

 apicem versus decrescentia, summa circ. 1,2 cm longa; stipulae minutae, subulatae. 

 Thyrsi inferiores 35 cm, summi 7 cm longi; cincinni stipite 5 — 6 mm longo adjeeto 1 cm 

 vix superantes, 5 — 6-flori; pedicelli 4 — 5 mm longi, basi articulati; alabastra ellipsoidea, 

 3,5 mm longa, albido-tomentella. Flores albi, suaveolentes, (masculi): Sepala in- 

 teriora 3,5 mm longa. Petala 4,5 mm longa, intus fere usque ad basin dense glanduli- 

 gera extus subeglandulosa, squamae superiores crista obovata vix emarginata appen- 

 diceque deflexa brevi obtusa villosa, inferiores crista oblonga instruetae. Torus glaber. 

 Stamina petala aequantia. Germinis rudimentum puberulum. 



In Mexico: Palmer n. 795! (Agiabampo, a. 1890). 



Obs. Maxime affinis Serj. sphenocarpae Radlk. (n. 120), attamen robustior, ut videtur, et 

 fruetu obtuso (nisi maturitate formam variat) nee non epidermide valde mucigera (an satis?) 

 distineta. 



119. S. Palmeri W T atson, Upon a Collection of Plants made by Dr. E. Palmer, in 

 1887, about Guaymas etc., Contrib. toAmer. Bot. XVI. in Proceed. Amer. Acad. XXIV. 

 (1889) 45, coli. Palmer n.61!; Radlk. in Sitzb. K. bayer. Acad. XXXVIII. (1908) 201, c. 

 syn. seq.; P. C. Standley, Trees and Shrubs of Mexico, in Contr. U. S. Nat. Herb. XXIII. 



