180 lex. ürban: 



bung der Arten zur Darstellung; kommen, damit nicht Entgegengesetztes 

 mit einander verglichen wird, was leicht zu Irrthümern bei dei' Bestim- 

 mung Veranlassung geben kann. 



Clavis speciernm. 

 I. Flores sessiles, cvipulis calj^coideis saepius plus minus inter sese coalitis, 



A. Folia apice rotundata v. obtusa, nervis lateralibus e mediani parte 

 inferiore tantum prodeuntibus utrinque 2 v. 3 sublongitrorsis. 



a. Folia 2,5 — 4 cm. longa. Corolla 4 — 5,5 mm. longa 



1. Seh. obovata Ch. Wright. 



b. Folia 4,5 — 6,5 cm longa. Corolla 7 mm. longa 



3. Seh. arenaria Britton. 



B. Folia acuminata v. raro obtusa, penninervia, nervis nunc parum con- 

 spicuis. 



a. Folia 2 — 3 mm. longa petiolata, acuminata, margine anguste revo- 

 luta. Pedunculi in axillis solitarii, 10 — 15 mm. longi 



2. Seh. didyma Ch. Wright. 



b. Folia 3 — 5 mm. longa petiolata, apice obtnsissima v. sensim an- 

 gustata, plana. Pedunculi er. 9 mm. longi 



3. Seh. arenaria Britton. 



c. Folia 3 — 8 mm. longa petiolata, margine plana subplanave. Pedun- 

 culi in axillis plerumqua plures, 1 — 4 mm. longi. 



a. Folia 4 — 8 mm. longe petiolata, basi acuta in petiolum angustata. 

 Corolla 2,5 — 4 mm. longa 4. Seh. chrysophylloides Planch. 



ß. Folia 3 — 5 mm. longe petiolata ;, basi rotundata et in petio- 

 lum protracta. Corolla 4 — 5,5 mm. longa 



5. Seh. Sehr eher i Gmal. 



II. Flores manifeste (nunc brevissime) pedicellati, cupulis calycoideis plane 

 disjunctis. 



A. Flores ad nodos numerosi glomerati, pedunculis nuUis v. subnullis 



6. Seh. ynultiflcyra Urb. 



B. Pedunculi ad nodos solitarii v. bini, 1 — 1,5 cm. longi 



7. Seh. Earrisii ürb. 



1. Schoepfia oboTata Ch. Wright, foliis 1,5 — 3 mm. longe petio- 

 latis, nunc obovatis apice rotundatis, nunc obovato-oblongis obtusis, 

 ad basin versus cimeatis, nervis lateralibus e mediani parte inferiore 

 prodeuntibus utrinque 2 v. 3 sublongitrorsis, margine planis v. sub- 

 recurvatis, adultis 2,5 — 4 cm. longis, 1,5 — 2,5 cm. latis; pedunculis 1 — 5 

 in axillis foliorum, 2 — 4 mm., raro —8 mm. longis, bifloris, raro 3- 

 V. 1-floris; corolla in flor. brachyst. cylindracea v. ovato-cylindracea, 

 cum lobis 5 — 5,5 mm. longa, in % alt. coalita, lobis ovato-triangula- 

 ribus; antheris breviter ovatis; stylo 1,2 — 1,5 mm. longo; corolla in 

 flor. dolichost. cylindraceo-campanulata, cum lobis 4 mm. longa, in 



