HO R. Knuth. — Oxalidaceae. 



147. 0. phaeotricha Diels in Engler's Bot. Jahrb. XXXVII. («906) 424; Weber- 

 bauer, Pflzwelt. peruan. Anden (1911) 249, nomen. — Pluricaulis, tota pilis satis longis 

 fuscis glandulosis sed mox simplicibus hirsuta. Gaulis 15 — 30 cm altus, inferne Sim- 

 plex, ascendens vel suberectus, 1 y 2 — 2 mm crassus, superne parum ramosus ramis dz 

 brevibus, inferne sparsim foliatus, parte media et superne densius foliis alternis et pe- 

 dunculis vix numerosis obsitus. Folia omnia caulina, erecto-patula, trifoliolata, vix longe 

 petiolata; foliola facie superiore glabra, facie inferiore rufo-pilosa vel -hirsuta, saepe 

 margine angustissime hyalino-membranacea, usque 10 — 12 mm longa et 6 — 7 mm lata, 

 ambitu elongato- vel spathulato-obcordata, antice sinu lato vel angusto leviter incisa, 

 glaucoideo-viridia, ecallosa; petioli circ. 2 cm longi, foliolis 2 — 3-plo longiores, vix car- 

 nosuli, satis stricti, exs. y 2 — 3 A mm crassi, rufo-hirsuti, basi stipulis 2 — 3 mm longis 

 adnatis parum perspicuis obsiti. Pedunculi in axillis foliorum solitarii, zb subhirsuti, 

 2 — 4-flori, 4 — 9 cm longi, exs. 3 / 4 mm crassi, erecti, satis stricti. Bracteae subulatae, 

 acutae, 2 mm longae. Pedicelli circ. 1 cm longi, exs. 1 / 2 mm crassi, satis stricti, de- 

 florati recurvati. Flos 14 — 17 mm longus. Sepala 6 — 7 mm longa, lineari-lanceolata, 

 acuta, pallide viridia, subhirsuta. Corolla conica, sepalis 3-plo longior; petala cuneato- 

 obovata, margine superiore zb rotundato undulata, lutea, fusco-rubro-striata. Stamina 

 maiora sepalis 1 1 /2~pl° longiora, glabra. 



Peru: Dept. Junin, Prov. Tarma, östlich von Palca auf Bergen in hoher Gras- 

 steppe mit eingestreuten Sträuchern, zwischen 3300 — 3600 m (Web erb au er, Fl. Peru 

 a. 1 903, n. 2486 — Typus!). — Blühend Februar. 



Var. ß. glabra R. Knuth. — Gracilior, tota glabra. 



Peru: An demselben Fundorte wie die Art. 



148. 0. Ortgiesii Regel, Gartenfl. (1875) 1, in Act. Hort. Petrop. III. (1875) H7; 

 Weberbauer, Pflzwelt. peruan. Anden (19H) 9 4, 288, nomen. — O. excisa Prog. in 

 Mart. Fl. Brasil. XII. 2. (1877) 496. — Acetosella Ortgiesii (Regel) 0. Kuntze, Rev. 

 Gen. I. (1891) 92. — Acetosella excisa (Prog.) 0. Kuntze, 1. c. — Florifera 20 — 40 cm 

 alta. Rhizoma horizontale, 1 5 cm et ultra longum, 5 mm crassum, atro-fuscum, radi- 

 culis filiformibus dz numerosis longis obsitum, unicaule. Caulis 20 — 40 cm altus, usque 

 4 mm crassus, simplex, densissime puberulus vel pubescens, alterne densissime foliatus. 

 Folia omnia caulina, praecipue versus apicem caulis congesta, trifoliolata; foliola pilis 

 adpressis praecipue subtus dense pubescentia, sessilia, usque 6 cm longa et 3Y2 cm 

 lata, exs. tenuia membranacea, viridia, ambitu semi-oblonga, antice lunulato-excisa, lobis 

 prorsus directis acutis; petioli 4 — 8 cm longi, foliolis 1 1 / i — 2-plo longiores, exs. 1 1 / 4 — 

 1 3 /4 mm crassi, pilis adpressis dense pubescentes, basi non dilatati. Pedunculi caulini, 

 ex axillis foliorum summorum provenientes, tenues, sed vix laxi, exs. 1 mm crassi, 

 petiolis aequilongi et eodem modo pilosi, apice cymam dt evolutam 5 — 1 0-floram ge- 

 rentes; rami primarii cymae usque 10 mm longi et cicatricibus 8 — 4 2 nodosi. Bracteae 

 verisimiliter mox deciduae, in spec. obviis nullae. Pedicelli longitudine varii, 2—5 mm 

 longi, tenues, adpresse pubescentes. Flos circ. 12 mm longus. Sepala ö 1 /^ — 6 mm 

 longa, lanceolata vel linearia, acuta, dz dense adpresse puberula vel demum glabres- 

 centia, viridia. Corolla sepalis 2 — 2 1 / / 2"Pl° longior; petala dz anguste cuneata, antice 

 rotundato-retusa, integra, citrina. Stamina stylique dense pilis patulis brevibus puberula. 



Peru: Dept. Junin (Raimondi n. 2832!, n. 8450!, n. 8487!, n. 8497!). Dept. 

 Loreto, auf Bergen östlich von Moyobamba in schattigem Walde, um 800 — 900 m 

 (Weberbauer, Fl. Peru a. 1904, n. 4765.'), Pongo de Cainarachi (Ule, Herb. Brasil, 

 a. 1902, n. 6354!), bei Tarapoto (Spruce n. 3999!). Dept. Maynas, bei Tocache in 

 dunklen Wäldern (Pöppig). — W. Trelease in Bailey, Stand. Cycl. IV. (1922) 2417 fig. 



Nota. De biologia speciei confer Hildebrand, Lebensverh. Oxcdis-Artcn (4 884) 7; de 

 anatoraia vide C hau vel, Rech. Oxalid. (4 903) 127 — 4 28. 



4 49. 0. vulcanicola D. Smith in Coult. Bot. Gaz. XXIII. (1897) 241. — Xan- 

 thoxalis vulcanicola (D. Smith) Small in North Americ. Flora XXV. 1. (1907) 55. — 

 Herbacea, procumbens vel scandens, paucicaulis, 20 — 70 cm longa. Caulis 2 — 3 mm 

 crassus, vix vel parum sulcatus, praecipue superne hirsutulo-pubescens pilis hyalinis 



