126 Anton Hciiticrl, 



tiidinali, intus prominente instructis, externo paulo iiiaiiire, axi rectiusciilo, gracili, elongato-fusiformi, leviter 

 sigmoideo, basi unilaterale distincte prominente. 



Genus monotypicum, deserticolum, in Africa austro-occidentali endemicum. 



Phaeoptilum spinosum Radlkofer 1. c. emcnd. 



Heimeii, Beiträge 7. — Tab. nostra II. 



Frutex (v. arbuscula) usque trimetralis, ramosissimus, spinosissimus (raro partim espinosus), ramis 

 frequentissimis, partim elongatis, sursum decrescentibus, oblique et j'igide patentibus, apice in spinam 

 abeuntibus, aut partim abbreviatis, in spinas vulgo 1 — 3 cm lg., rarius usque ad 7-5 cm elongatas v. solum 

 5 — 7 mm Ig. mutatis, aut brevissimis, pulviniilos frequenter secus omnes ramificationes et imprimis ad 

 basin et inferiorem partem spinarum dispositos formantibus, piilvinulis i'olia fasciculata et postea v. flores 

 singulos V. usque 8 flores subglomerulatos emittentibus. 



Rami elongati, paululum flexuosi, pulvinulis frequentissimis dz nodosi, firmi, rigidi, internodiis valde 

 brevibus, peridermio griseolo ad brunneo v. atro, v. subirregulare tenue et densius ruguloso v. laeviusculo, 

 subteretes ad leviter obtusanguli, inprimis apices versus brevissime tomentelli, ceteruin glabriusculi, frequen- 

 tissime spinigeri, spinis lateralibus, simplicibus, ± robustis, raro tenuioribus, rectis, oblique ad subhori- 

 zontale patentibus, teretibus armati et insuper puK'inulis (i. e. ramulis abre\'iatissimis) x'erruciformibus, 

 usque 3 mm lg., griseo- ad rufescenti-tomentellis, frequentissimis obtecti. 



P'olia usque 2 — 10 fasciculatim conferta, raro pauca in apice spinarum, \alde angusta, linearicuneata 

 ad sublinearia, antice latissima (8 - 27 mm : 1 — 4 mm), basin \'alde angustam, sessilem \-ersus sensim, 

 rarius in petiolum minutum (Imm lg.) contracta, apice v. breve rotundata v. subtruncata w leve emarginata, 

 consistentia crassiuscula, lutescenti- ad griseoviridia, concoloria, glabra v. saepius rb dense griseo- ad 

 rufescenti-tomentella, indumento dein H evanescente, integra, f. enervia. 



Flores in magnitudine valde variantes, v. sessiles v. brevissime (ad \--'2miii) stipitati, stipite 

 tomentello, primum erecto, dein patente ad le\-e deflexo. 



Perianthia \-iridescentia w luteola (?), intus glabra, lobis in mediana parte coloratis, in lateribus 

 f. achrois. 



Species in spinarum longitudine, foliorum indumento et magnitudine, florum formatione, antho- 

 carpioruiii magnitudine et colore etc. eximie mutabilis praebet sequentes tres variationes: 



Var. a typica m. 

 Heimerl, Beiträge 7. — Tab. nostra II, Fig. I. 



Syn.: Phaeoptilum spiiiosm/i Radlkofer! 1. c. 



Folia minora 8 — lö ;;/;;; lg., 1 — 1-5;;/;» lt., pilis bres'issimis minute hirtiila, sessilia. Pulvinuli 5 — 8 

 flori; flores sessiles. Perianthia (a basi ad loborum apices usque 5 7;;;;Hg.) minora, aperta ad 4 mm lt., 

 circiter usque ad dimidium partita, lobis latissime owatis, c. 2'5mm lg., 'Iiinii lt., cucullatis. Stamina longiora 

 ad 5 mm lg., breviora ad 3"5 ;;;»?; pollinis granula (sec. Radlkofer) solum 21 \x in diametro; antheris ad 

 \ -5 mm \g., \ mm lt. Anthocarpia (cum alis) 13 — 15«?;;/ lg., 11 — 12-5 mm lt., corpore central! solum 

 \0 mm Ig. et 2' 5 — 3mm lt., pallido v. lutescenti-brunneolo, basin versus angustato, alis eximie tenuibus, 

 fragilibus, apice valde et basi corpus centrale superantibus, in basi rotundatis, ad 4-5 mm lt., intense rufo- 

 brimnescentibus. 



Var. b intercedens m. 

 Ilcimcrl, Beiträge 7. — Tab. nostra II, Fig. II, III, n, c, f. 



Syn.: Pliacoptiliim spinosum p, p.l et Plt. Heimcrlii Engler! Bot. .Tahrb. XIX. 133. 

 Phaeoptilum spinosum \ar. y Heimerl, Beiträge 7. 



