Crinum asiaticum

Crinum asiaticum L., Sp. Pl. 292 1753. (Syn: Bulbine asiatica (L.) Gaertn.;                           Amaryllis carnosa Hook.f.; Crinum albiflorum Noronha [Invalid]; Crinum amabile Donn ex Ker Gawl.; Crinum amabile var. augustum (Roxb. ex Ker Gawl.) Ker Gawl.; Crinum angustifolium Herb. ex Steud. [Invalid]; Crinum anomalum Herb.; Crinum asiaticum var. declinatum Herb.; Crinum asiaticum var. procerum (Herb. & Carey) Baker; Crinum augustum Roxb. ex Ker Gawl.; Crinum bancanum Kurz; Crinum bracteatum Willd.; Crinum carinifolium Stokes; Crinum cortifolium Hallier f.; Crinum declinatum Herb.; Crinum floridum Fraser ex Herb. [Illegitimate]; Crinum hornemannianum M.Roem.; Crinum macrantherum Engl.; Crinum macrocarpum Carey ex Kunth; Crinum macrophyllum Hallier f.; Crinum northianum Baker; Crinum plicatum Livingstone ex Hook.; Crinum procerum Herb. & Carey; Crinum redouteanum M.Roem.; Crinum rigidum Herb.; Crinum rumphii Merr.; Crinum sumatranum Roxb. ex Ker Gawl.; Crinum superbum Roxb.; Crinum toxicarium Roxb.; Crinum umbellatum Carey ex Herb.; Crinum woolliamsii L.S.Hannibal; Crinum zanthophyllum Hannibal; Haemanthus pubescens Blanco [Illegitimate]; Lilium pendulum Noronha);
Seashore Lily, Grand crinum lily, Poison Bulb, Giant Crinum Lily, Spider Lily, Nagdaun, Nagdamun • Hindi: Nagadamani नागदामिनी , Sudarshan सुदर्शन • Tamil: விஷமூங்கில் Visamumgil • Malayalam: Pulattali ;
As per efi thread :
Incidentally I have Bailey, Manual of Cultivated plants (a standard reference for cultivated plants) which treats Crinum asiaticum, C. amabile and C. augustum as three distinct species. Former is differentiated by white perianth and latter two by perianth red at least on outside. The author admits C. augustum as "doubtfully specifically distinct from A. amabile" differing in larger bulbs (up to 15 cm in diam.), less fragrant, and broader perianth segments (12-20 mm broad) as against smaller bulb, highly fragrant flowers and 10-12 mm broad segments. C. asiaticum is considered as a very variable species with bulb 10-13 cm in diam, flowers highly fragrant, white, with 10-12 mm broad segments;  

Bulbous herbs; bulb globose, 12 x 10 cm, neck 10-20 cm. Leaves clustered from the apex of bulbs, oblong, 70-100 x 1.5-8.5 cm, flat, coriaceous, glabrous, narrow at base, margin entire, apex gradually tapering. Scape to 30 cm long, often more, 1-2 cm across; umbels 10-17 cm, 30(50)-flowered; bracts hooded, ovate-lanceolate, 7-8.5 x 4.5 -5 cm; bracteoles to 5 cm. Flowers to 16.5 cm long, 10(14) cm across. Perianth salver-shaped; tube to 10 cm; lobes white, oblong-linear, to 7 x 1.2 cm, glabrous, 18-20 nerved, subacute, cuspidate. Filaments to 4.5 cm; anthers 2x0.2 cm. Ovary 3-celled; ovule(s) 1 or 2; style to 15 cm.     
Flowering and fruiting: April-July       
Sandy coasts and wet places in deciduous forests     
South India and Sri Lanka

Crinum asiaticum is a BULB growing to 1.2 m (4ft).
It is hardy to zone 8. It is in flower from Jun to August. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Insects
The bulb contains alkaloids, notably lycorine and crinamine[283]. A poultice made from the heated, pounded, fresh bulb is used to relieve osteodynia and rheumatism[283]. The juice of the fresh bulb is used as an emetic, whilst it is also instilled in the ear to treat otis[283]. A poultice of the heated, pounded, fresh leaves is used to treat contusions, sprains, fractures, luxations etc[283]. A decoction of the dried leaves is used as a wash in the treatment of haemorrhoids[283].  
(From PFAF )
Crinum from Andamans: Photo: 2011-01-08
Elephant Beach, Havelock Island, Andaman Islands
Plant growing on the beach (sandy). Leaves nearly 1 m. No flowers but fruits.
Not sure if Crinum can be identified without flowers. So is this C.asiaticum? or something else. 
- This looks like C. asiaticum the "Sukhdarshan" as it is popularly called.
- it is Crinum asiaticum.
- For C. asiaticum the bulb would have a neck 30 cm long; Leaves to be flat, nearly 2 m long and 15 cm wide. Scapes have to be 3 cm wide and upto 1 m long.  
- This plant can for sure have a bulb neck that is 30 cm long as you cant see the bulb at all. Leaves length depends on light, nutrients and water availability so I guess this specimen growing in sand on sunny sea-shore never will have leaves of 2 m length. There are also many different cultivars of C. asiaticum that shows a big difference in general size, leaf shape and colour.

Date/Time- Aug 2011
Location- Place, Altitude, GPS-Pune
Habitat- Garden/ Urban/ Wild/ Type-Garden
Plant Habit- Tree/ Shrub/ Climber/ Herb-  Plant
Height/Length- 3 feet
Leaves Type/ Shape/ Size- big green
Flowers Size/ Colour/ Calyx/ Bracts- white flowers
Fruits Type/ Shape/ Size Seeds-Not seen 

Crinum asiaticum indeed. bulbs of this plant is poisonous. 
this is the plant I had found was very popular in Bombay in the late 70s and 80s for decorating wedding halls... we did not have it in Bengal then... our decorators used / still use rajanigandha / tuberose flowers to make the same linear or criss-cross jaal... to cover walls ans mandaps.... wonder if its still popular on the west coast.... 
nowadays Roses and Tuberoses as you pointed out are used commonly for decorations. I too remember these Lily flowers being used in the past.
efloraofindia:''For Id 16102011MR2’’ ? fruit of Crinum asiaticum Pune:  This had flowered 2 months back and now I see this bulbous fruit like structure. Is it a fruit? Please validate
Yes ..... A lucky flower that manages to produce fruit
Crinum Lily for ID : Delhi : 120612 : AK-1: An ornamental, cultivated plant photographed at Lodhi Gardens, Delhi on 3/9/11.
Kindly id.
Crinum asiaticum!
efloraindia: Crinum asiaticum:  
Sharing the images of Crinum asiaticum from Coimbatore.
Location: Peelamedu, Coimbatore
Date: 02.12.2011
Habitat: Garden
Habit: Herb
efloraofindia:''Id 18062012MR1’’ white spider camouflaged in Spider lily(Crinum asiaticum) flower at Pune:  June 2012 at a private society in Pune
Sharing pictures of a white spider camouflaged in the throat of a Spider lily (Crinum asiaticum) flower.
It was also trying to kill a black spider which escaped later. Sharing 2 images of the flowers too
This is a Crab spider of Family Thomisidae possibly Thomisus spectabilis.
Hooghly Today : seems to be Crinum : 6 images. 6 posts by 2 authors.
It might be Crinum asiaticum L.; F. B. I. vi. 280. 
Yes Crinum asiaticum.
Crinum asiaticum from me too
Hooghly : Crinum toxicarium Roxb. (Crinum asiaticum var. asiaticum) : Attachments (7).  1 post by 1 author. 
There is a special note in Flora Indica, vol. p135; and the illustration mentioned there, is -
It has distinct stem and leaves are more than 5".
It is BARO-KANOOR (বড় কানুড়) in Bengali.
Hooghly sk-nov-03 - ornamental Crinum sp. : 11 posts by 3 authors. Attachments (7)
This is 4ft ornamnetal Crinum, found 29-Oct-2014, having 20+ flowers on its scape.
very common
even back in the dark ages, our college campus had lots of these
they have all but disappeared
nice scent when flowers first opened.
alas for the new students 
seems to be crinum asiaticum
I have seen Crinum asiaticum, which is very stout plant, my post of that particular individual is at efi thread. This may be a cultivar, I do not know, but I would say it is much weaker than the one I saw.

what does weker mean
got less nutrition? less water? more competition?
Yes Didi, "weaker" doesn't mean anything, these individuals can be young plant too. But as per Flora Indica flowers of Crinum toxicarium Roxb. are "almost inodorous" and as per Sir Prain leaves are 5 inch or more wide. The leaves here a little less, the widest region about 11 cm. But, at the same time I must say that cultivars perhaps defy rules, or do have added or sometime lacking type characters.
It blooms in my house in Delhi every year, though very few species of plants stay happy here.
it just dawned on me this dawn that there may be micro-nutrient deficiency in the soil where its growing may be that's why its "weak" looking?
look around at the other plants near it.. any browning of the tips of leaves?
any yellowing?
or other discoloration? 
No, Didi, the soil is nutrient-rich, and this plant maybe type species of Crinum asiaticum L., as you have suggested earlier.
Pedicellate flower, length and width of leaves, length of perianth tube and lobes do match and FoC has fragrant flowers. Roxburgh's toxicarium may not be type species, and I do not know anything of the endless type botanists do have.
Goa, May 2015 :: Requesting ID of this lily :: ARKJUN-08/19 : 4 posts by 3 authors. Attachments (5)
Requesting to please ID this lily from a beach resort at Varca, Goa in May 2015.
Is it Crinum asiaticum?
Thank you ... for the possible ID. Hoping to get it validated.
Yes Crinum asiaticum.
Crinum for ID :: JJ - Patan, GJ, March 2018 :: ARKAPR-19 : 2 posts by 2 authors. Attachments (3)
Clicked this lily species near Patan, GJ in March 2018.
Is this some Crinum secies? Requested to please ID.

Pl. check

070609 in Bangalore;at Karnala Bird sanctuary, Mumbai-Goa highway, Maharashtra- 26th Jully 2009; Kancheepuram Dist., TN- 21 Nov 2009; Garden Flower for ID-130609-RK2 - indiantreepix | Google GroupsIs it Crinum viviparum? - indiantreepix | Google GroupsCrinum for conformation. - efloraofindia | Google Groups
... at a resort  in Virajpet, Coorg
Dates: November 10 - 11, 2019 ... Altitude: about 910 m (3000 ft) as
Crinum asiaticum var. pedunculatum  (R.Br.) Fosberg & Sachet