420 H. Wolff. 
Herba perennis vel monocarpica, glabra, elata, radice tuberoso-napi- 
formi. Folia subternata, segmentis angustissimis. Umbellae compositae, 
pauciradiatae; involucrum nullum; involucella oligophylla. Flores flavidi. 
Genus novum adhuc monotypicum florae mexicanae civis. 
4. Schiedeophytum fallax Wolff, nov. spec. 
Planta + metralis ut videtur monocarpica, glabra, radice tuberoso- 
napiformi. Caulis solitarius, stricte erectus, teres, striolatus, late fistu- 
losus, inferne simplex et remotissime foliosus, superne ramosus, ramis 
paucis, erecto-patentibus, vix ramulosis. Folia basalia pauca, petiolo 
tenui, tereti, inferne anguste canaliculato, ad basin subsubito in va- 
ginam brevem, amplexicaulem. abeunte, laminam + aequante, !/,— 
3/4, mm crasso fulta; lamina usque ad basin tripartita, partitionibus an- 
guste linearibus, longe acuminatis, acutis, margine toto obsolete serratis, 
crasse uninerviis, n. subtus scabrido remote longeque pinnato-venoso, ad 
10 cm longis, 2--3 mm latis: f. caulina illis subconformia, vagina plane 
amplexicauli, foliolis longe ut in petiolulum angustatis; fulerantia ad la- 
minam perparvam subsetaceo-ternatam, vaginae longae semiamplexicauli 
insidentem reducta. Umbellae parvae, 1-4 cm longe peduneulatae, 
2—4 cm latae; involucrum nullum; radii 5—6, filiformes vix divaricati, 
subaequales, 1—2 cm longi. Umbellulae + 5 mm latae; involucellorum 
phylla 2—3, angustissima, pedicellos aequantia; flores + 10, eorum 2—3 
fertiles, ceteri steriles; pedicelli 2—3 mm longi, subaequales, capillares. 
Petala flava, fl. 9 non visa, c? a dorso late obtriangularia, apice late 
leviterque emarginata, lobulo inflexo e basi lata sensim angustato, acuto, 
dimidio breviore instructa, ca. 1 mm longa. Fructus subcordato-ovoideus, 
ca. 1!/, mm longus, saturate brunneus, jugis filiformibus flavidulis; 
calycis dentes inconspicui; stylopodium manifestum, conoideum, margine 
infero crenulatum; styli brevissimi, reflexi, stylopodio aequilongi. Meri- 
carpia transverse pentagono-rotundata, area commissurali angusta inter 
sese connata, ceterum ad faciem planam libera; juga commissuralia 
marginantia; vittae commissurales 4, valleculares ternae vel quaternae; 
semen ad faciem planum. 
Mexico: Prope las Trojes (Schiede, s. n.): flor. mense Novembri 
et Decembri. 
Langlassea Wolff, nov. gen. 
Calycis dentes inconspicui. Petala a dorso visa obovata, apice ob 
costam impressam manifeste emarginata, lobulo inflexo plicato, fere 
usque ad basin petali descendente, apice introrsum spectante instructa. 
Stylopodium plane depressum, margine crenulatum; styli longissimi; 
antherae parvae, a dorso cordato-orbiculares. Fructus (junior) ovoideo- 
oblongus, a latere manifeste compressus, ubique dense longeque villosus; 
mericarpia transverse pentagona, facie plana; juga (sub pilos occulta) 
crassa, valde prominentia, commissuralia marginantia; vittae ad commis- 
suram 4, ad valleculas binae usque quaternae; semen planum. 
Herba perennis, hirsuta: folia inferiora . . superiora subindivisa 
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