146 Specielle Morphologie und Systematik der Phanerogamen. 



Fortsetzung der Monographie der Lythraceen (vgl. Botan, Jahresbericht für 1880, 

 Abth. II, S. 125). 



Die 23 Species der Gattung Lythrum theilt Verf. in 2 Subgenera mit 4 Sectionen 

 nach folgendem Schema: 

 Flores in axillis solitarii v. altero acccessorio gemini: Subgenus I. Hyssopifolia. 

 Plantae laete virides. 

 Tubi calycini longitudo sub anthesi faucis diametrum 1— Splura aequans. 

 Species heterostyla staminibus 8, petalis calyce longioribus: Sect. 1. Hoch- 



stetteria. 

 Species horaoeostylae staminibus 1—6, petalis calyce brevioribus v. nuUis: Sect. 2. 

 Middendorfia. 

 Tubi calycini longitudo sub anthesi faucis diametrum 4— 7plum aequans: Sect. 3. 

 Salzmannia. 

 Plantae cano-v. subglauco-virides : Sect. 4. Euhyssopifolia. 

 Ovarii stipes annulo incrassato haud cinctus. Species aut homoeostylae 1 — 12-andrae 



aut 12-andrae trimorphae: Subsect. Pentaglossum. 

 Ovarii stipes annulo incrassato cinctus. Species heterostylae dimorphae 6-andrae; 

 Subsect. Pythagorea. 

 Flores in dichasiis axillaribus dispositi: Subgenus II. Salicaria. 



Für die zahlreichen Arten von Cuphea giebt Verf. die nachstehende Gruppirung an: 

 I. Lythrocuphea: Prophylla 0, calyx 4— 14mm longus. 



Sect. 1. Archocuphea: Pedicelli ex parte oppositi, ex parte alterni. 

 Sect. 2. Enantiocuphea: Pedicelli omnes oppositi. 



Subsect. 1. Notodynamia: Petala dorsalia 2 ceteris majora. 

 Subsect. 2. Gaster oäynamia: Petala dorsalia 2 ceteris miuora. 

 II. Eucuphea: Prophylla 2, interdum minima; in unica specie nulla, in qua vero simul 

 calyx 21— 25 mm longus. 



A. Intermediae: Flores oppositi, sed in quovis pari inaequales, altero juniore, in 

 racemis propter bracteas omnino hypsophylloideas distinctissirais dispositi. Calyx 

 4 — 9 mm longus. 



Sect. 3. Heteranthus. 



B. Aphauanthae: Flores alterni v. ad verticilla 3 na gemini, ad 4na 3ni, rarissime 

 in nodis nonnullis tot quot folia, semper in quovis nodo aetate aequales. Calyx 

 3 — 11 mm, raro —13, rarissime —15 mm longus. 



Sect. 4. Melicyathium: Discus cupuliformis. Ovula 50 — 90. 



Sect. 5. Brachyandra: Discus dorsalis. Ovula 2—32. Stamina tubum longa non 



aequantia. 



Subsect. 1. Microcuphea: Folia 3na, 4na v. 5na, 4— 8 mm longa. 



Subsect, 2. Melanium: Folia opposita. Semina exalata v. angustissime marginata. 



Subsect. 3. Balsamonella: Folia opposita. Semina circumcirca alata. 

 Sect. 6. Euandra: Discus dorsalis. Stamina tubum circ. aequantia v. superantia. 



Discus supra planus v. concavus, subtus convexus. Petala decidua. Folia sessilia 



V. brevissime petiolata. 



Subsect. 1. Flatypterus: Semina circumcirca alata. Ala tenuis arguta. 



Subsect. 2. Hyssopocuphea: Semina circumcirca parum marginata v. omnino 

 exalata, 2 mm longit. haud aequantia. Folia opposita. 



Subsect. 3. Pachypterus: Semina circumcirca alata, ala crassa margineque retusa. 



Subsect. 4. Hilariella: Semina ut in 2, 2 mm aequantia v. superantia. 

 Sect. 7. Trispermum: Discus dorsalis valde deflexus, supra semiglobosus, subtus 



excavatus. Stamina tubum circ. aequantia v. superantia. 

 Sect. 8. Pseudocircaea: Omnia ut Sect. 6, sed petala persisteutia (an semper?), 



folia saltem inferiora longiuscule petiolata. 



