G. Bitter, Ein Gattungsbastard zwischen Acaena u. Margyricarpus. 239 
II. Index eollectionum: plantae a P Dusen vel Goesta 
Joensson reportatae. 
EE secundus in parenthesi et typis cursivis positus numerum 
denotat.) 
26 [29], 31 [26], 35 [35], 149 [36], 151a [41], 189a [50], 205a [48], 
212a [54], 216-/[56], 218a [31], 314a [50], 317 [56], 324a [41]. 337a 
[52], 385a [57], 439a [56], 451a [43], 558a [18], 646 [46], 873a [32], 
990a [205], 1085a [47], 2455 [28], 2456a [27], 2615 [54], 3763 [39], 
3965 [37], 6723 [31], 6909 [55], 7072 [20], 7078 [2 B], 7141 [20], 7529 
[48], 8340 [48], 8658 [45], 8777 [48], 8931 [30], 8950 [2y], 10081 [231], 
10082 [40], 10139 [49], 10330 [48], 10414 [58], 10484 [54 var.], 10485 
[50], 10486 [34], 10488 [51ß], 10523 [56], 10539 [52], 10639 [53], 
10839 [25], 10946 [29], 11070 [38], 11082 [39], 11096 [36 B], 13186 
[48], 13250 [50], 13272 [54 var.], 13425 [2y], 13427 [39], 13537 [36]. 
13538 [26], 13583 [54], 14405 [26], 14488 [27], 14490 [29], 15307 [21], 
15791 [25], 15797 [42], 16217 [56], 16358 [49], 16405 et 17549 [27], 
17881 [39]. 
Á e xx Georg Bitter, Ein Gattungsbastard zwischen Acaena 
und Margyricarpus: Margyracaena. 
x Margyraeaena Skottsbergii Bitt., gen. et spec. nov. hybrid. 
Acaena argentea R. et P. x Mergers setosus R. et P. subsp. 
digynus Bitt. 
Suffruticosa; rami vegetativi robusti, 4—5 mm diam., decumbentes 
vel + ve horizontaliter explanati, in partibus vetustioribus lignosis reliquiis 
foliorum emortuorum, praecipue vaginis sordide fuscescentibus, + ve 
dense involuti, laxiuscule irregulariter. ramosi; internodia brevia, ple- 
. rumque 4—8 mm, rarius Lem longa, in statu novello pilis tenuibus longis 
crebris obsita, serius + ve glabrescentia, cortice rubri-fusco tandem 
defoliante obtecta; foliorum vaginae cr. 6—10 mm longae, 7—8 mm latae, 
subamplexicaules, viridi- vel tandem rubri-fuscescentes, extus pilis longis 
tenuibus densis subsericei-strigosae, intus flavi-fuscescentes et parcius 
pilis longis obsitae, apice in stipulas anguste lineari-lanceolatas longe 
acuminatas acutas simplices vel 2-fidas 7—8 mm longas 2—3 mm latas 
frondosas in vaginarum marginibus decurrentes exeuntes; petiolus fere 
nullus; lamina imparipinnata, 5— (plerumque) 7-juga; interstitia brevia, 
1—3 mm longa, rhachis ergo. 15—20 mm tantum longa, utrinque dense 
subsericei-pilosa; foliola inferiora lineari-lanceolata, longe acuminata, 
simplicia vel dentibus paucis incisa, 6—9 : 1—2 mm, superiora sensim 
majora, lanceolata, lateralia basi obliqua, sessilia, infra medium latissima, 
ad apicem versus sensim acuminata, acuta, 18—20 : 3—4 mm, dentibus 
in utroque latere 2—3 acutis incisa, foliolum terminale petiolulo 2 mm 
